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BESTEK-Multi-Functional-Car-Jump-Starter-Built-in-10000mAh-Battery-Capacity-with-SOS-and-Strobe-Light-Modes-and-USB-Charge-Ports - Free Shipping $31.99

$31.99
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BESTEK ADVANTAGEJump start your vehicle with maximum of 5L gas or 3L diesel engine around 20 times with 600amps peak current and heavy duty clamps and cables.
EASY TO RECHARGE: Built-in 10000mAh battery capacity can be fully recharged within 3 hours through the included wall charger or car charger; 4 LED lights monitor the battery charing level; Ultra-bright LED light with SOS and strobe light modes.
WHAT YOU GET: BESTEK Jump Starter Portable Charger, Jumper Cables, 12V Wall Charger, 12V Car Charger, 4 in 1 Mobile Adapter, Welcome Guide, and BESTEK 18-month warranty with friendly customer service.
BESTEK Multi-Functional Car Jump Starter----600A peak current ensures you never get stranded with a dead car battery
Ultra compact to store in your glovebox, and light enough to pack in your bag.
10,000 mAh battery capacity gives your 5L gas or 3.0L diesel vehicle engine up to 20 jump starts
Dual USB charging ports with Smart IC technology to intelligently identify your devices to deliver its fastest charge speed up to 2.4 amp per port or 4.2 amps overall.
Sturdy drop-tested exterior ensure durability and safety.
What You Get
1 x BESTEK Multi-Functional Car Jump Starter External Battery
1 x 12V Adapter
1 x 12V Car Charger
1 x Micro USB Charging Cable
1 x Ignition Power Cord
1 x Instruction Manual

https://www.walmart.com/ip/BESTEK...3=&veh=sem
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#2
Bestcrap maybe
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These actually aren't bad, mine was able to start a honda 3.5L V6 with ease and there are a few youtube videos of it starting V8 engines. The price has now gone down to $29.99, so I'm in for another.
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Quote from BatteryG
:
These actually aren't bad, mine was able to start a honda 3.5L V6 with ease and there are a few youtube videos of it starting V8 engines. The price has now gone down to $29.99, so I'm in for another.
the other bestek deals made front page so even though this thread got crapped on, i think bestek is solid. this unit though is actually 600a peak while the other one was 400a but it got labeled as 600a. i verified on the bestek site. this unit actually got good reviews on amazon but it's not sold on there anymore. fakespot grade of B i believe.
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#5
I got the other, green and black one a few weeks ago. It came at around 73% and took around 30-60 min to get to 100%. I then used it to start a car that hadn't been run in over a year with a completely dead battery. Took only a few seconds to turn over the solidified engine gunk and get it running. These things work. If this is more powerful, so much the better.

However, a big caveat. A different car had its battery die overnight, a much newer one with a smaller engine and battery. Tried to use the Bestek, and nothing happened, other than the warning light indicated a reverse polarity connection coming on with a continuous beep. I confirmed that the connections were correct and not reversed. Tried disconnecting everything and trying again, several times, with the same result each time.

Took the whole thing inside and on a whim, opened up the small circuit box that straddles the black/negative cable that connects the battery to the clamp. There's a whole bunch of discrete components on the circuit board, but most prominent were 4 power MOSFETS, model F2804S 2 each on either side of the board. Using a jeweler's loupe, it looked like a solder bridge connection between each pair of MOSFETs had been broken, probably by either a short circuit or overload, and there were signs of scorching.

I confirmed that they were supposed to be bridged by using a continuity tester between the MOSFETs on either side of the board (as opposed to the ones on each side), and they were indeed bridged. So I got a solder iron and some solder, and re-bridged each MOSFET pair, and closed up the circuit box. Took it back down to give it another go, and it immediately started up both cars.

So, these work, but are cheaply made. Most likely they're clever knock-offs of more established brands. I don't know how long my fix will hold up. If they're using cheap components elsewhere, something will go eventually, be it the actual MOSFETs (fairly easily replaceable though), a small cap, SMD components, traces, corresponding components in the battery unit, the battery itself, or the charger.

This is probably comparable to a cheap PC power supply. It'll work, for a while, but it won't last as long as the better ones.

Incidentally, as I finished typing this, the new Costco circular arrived, and it has a comparable device going for $50. Can barely make out the brand name and it looks like "Winplus". Unless money is SUPER tight, I'd go with the one from Costco or a better-known brand.

Ok, it's on their web site and available now at this price, till 11/22. Here's the link and some specs:

https://www.costco.com/Lithium-Ju...12116.html

Features:
  • High Output UL certified Jump Starter with Smart cable protection.
  • Heavy duty Aluminum case
  • 2 USB Ports for Fast Charging of Mobile Devices (2.1 A + 1.0 A)
  • 8000mAh High Capacity Power Bank
  • Recharges up to 1000 times
  • 3 Mode Flashlight

Product Specifications:
  • Product Dimensions: 5.43 x 3.03 x 1.06 in (138 x 77 x 27 mm)
  • Product Weight: 0.79 lbs (359g)
  • Capacity: 8000 mAh
  • Input: 5V 2A
  • Output: USB2.0; 5V 2A; 12V for car jump starter
  • Charging Time: 3 hours (varies depending on charger used)
  • Starting Current: 200A
  • Peak Current: 350A
  • Lifetime: Up to 1000 recharges
  • Operating Temperature: -4ºF ~ 93ºF (-20ºC ~ 34ºC)
  • Battery Charge Time: 3 Hour
  • Battery Voltage: 12 Volt
  • Brand: Winplus
  • Car Lighter Adapter: Yes
  • Color: Brushed Aluminum
  • Depth: 5.43 in.
  • Height: 1.06 in.
  • LED Indicator: Yes
  • On/Off Switch: Yes
  • Portable/Stationary: Portable
  • USB Compatible: Yes
  • Weight: 0.79 lbs.
  • Width: 3.03 in.
Package Includes:
  • Jump Start Power Bank
  • Smart Jumper Cable with Built-In Polarity Protection
  • 5V USB Car Charger
  • Micro USB Cable
  • User's Manual
  • Storage/Travel Case

I think I'll get one as an additional unit, and keep the Bestek.
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Last edited by KMan October 21, 2017 at 12:11 PM.
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#6
Quote from KMan
:
I got the other, green and black one a few weeks ago. It came at around 73% and took around 30-60 min to get to 100%. I then used it to start a car that hadn't been run in over a year with a completely dead battery. Took only a few seconds to turn over the solidified engine gunk and get it running. These things work. If this is more powerful, so much the better.

However, a big caveat. A different car had its battery die overnight, a much newer one with a smaller engine and battery. Tried to use the Bestek, and nothing happened, other than the warning light indicated a reverse polarity connection coming on with a continuous beep. I confirmed that the connections were correct and not reversed. Tried disconnecting everything and trying again, several times, with the same result each time.

Took the whole thing inside and on a whim, opened up the small circuit box that straddles the black/negative cable that connects the battery to the clamp. There's a whole bunch of discrete components on the circuit board, but most prominent were 4 power MOSFETS, model F2804S 2 each on either side of the board. Using a jeweler's loupe, it looked like a solder bridge connection between each pair of MOSFETs had been broken, probably by either a short circuit or overload, and there were signs of scorching.

I confirmed that they were supposed to be bridged by using a continuity tester between the MOSFETs on either side of the board (as opposed to the ones on each side), and they were indeed bridged. So I got a solder iron and some solder, and re-bridged each MOSFET pair, and closed up the circuit box. Took it back down to give it another go, and it immediately started up both cars.

So, these work, but are cheaply made. Most likely they're clever knock-offs of more established brands. I don't know how long my fix will hold up. If they're using cheap components elsewhere, something will go eventually, be it the actual MOSFETs (fairly easily replaceable though), a small cap, SMD components, traces, corresponding components in the battery unit, the battery itself, or the charger.

This is probably comparable to a cheap PC power supply. It'll work, for a while, but it won't last as long as the better ones.

Incidentally, as I finished typing this, the new Costco circular arrived, and it has a comparable device going for $50. Can barely make out the brand name and it looks like "Winplus". Unless money is SUPER tight, I'd go with the one from Costco or a better-known brand.

Ok, it's on their web site and available now at this price, till 11/22. Here's the link and some specs:

https://www.costco.com/Lithium-Ju...12116.html [costco.com]

Features:
  • High Output UL certified Jump Starter with Smart cable protection.
  • Heavy duty Aluminum case
  • 2 USB Ports for Fast Charging of Mobile Devices (2.1 A + 1.0 A)
  • 8000mAh High Capacity Power Bank
  • Recharges up to 1000 times
  • 3 Mode Flashlight

Product Specifications:
  • Product Dimensions: 5.43 x 3.03 x 1.06 in (138 x 77 x 27 mm)
  • Product Weight: 0.79 lbs (359g)
  • Capacity: 8000 mAh
  • Input: 5V 2A
  • Output: USB2.0; 5V 2A; 12V for car jump starter
  • Charging Time: 3 hours (varies depending on charger used)
  • Starting Current: 200A
  • Peak Current: 350A
  • Lifetime: Up to 1000 recharges
  • Operating Temperature: -4ºF ~ 93ºF (-20ºC ~ 34ºC)
  • Battery Charge Time: 3 Hour
  • Battery Voltage: 12 Volt
  • Brand: Winplus
  • Car Lighter Adapter: Yes
  • Color: Brushed Aluminum
  • Depth: 5.43 in.
  • Height: 1.06 in.
  • LED Indicator: Yes
  • On/Off Switch: Yes
  • Portable/Stationary: Portable
  • USB Compatible: Yes
  • Weight: 0.79 lbs.
  • Width: 3.03 in.
Package Includes:
  • Jump Start Power Bank
  • Smart Jumper Cable with Built-In Polarity Protection
  • 5V USB Car Charger
  • Micro USB Cable
  • User's Manual
  • Storage/Travel Case

I think I'll get one as an additional unit, and keep the Bestek.
thanks for weighing in! i'm a pc builder so your psu comparison is a great point and really puts this into perspective. i had the same feeling about a generic brand versus a name one. i'm glad i got another ravpower unit to replace my other one. the batteries on that one expanded on me because i made the mistake of leaving it in a bad spot inside my suv. too much exposure to the hot sun lately. i won't make that mistake again. that unit was able to jump every single sedan or suv in its path since january of last year.

i was definitely considering the bestek since it's only $30 but didn't want to wait for it to ship. pretty sure it's coming from china from what i've read. i paid $10 more for a new one someone had on ebay. i've seen that winplus posted before when searching but that one is on the weaker side, 200a/350a. the ravpower i have is 500a peak. this bestek deal is 600a and was also sold on amazon with good reviews and had an A fakespot grade. the bestek you have is actually 400a peak even though all the deal posts listed it as 600a. before i'd recommend the bestek to someone looking for a deal but i'll probably tell them to spend some more and get a ravpower or something like that.
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#7
Quote from jdpower619
:
thanks for weighing in! i'm a pc builder so your psu comparison is a great point and really puts this into perspective. i had the same feeling about a generic brand versus a name one. i'm glad i got another ravpower unit to replace my other one. the batteries on that one expanded on me because i made the mistake of leaving it in a bad spot inside my suv. too much exposure to the hot sun lately. i won't make that mistake again. that unit was able to jump every single sedan or suv in its path since january of last year.

i was definitely considering the bestek since it's only $30 but didn't want to wait for it to ship. pretty sure it's coming from china from what i've read. i paid $10 more for a new one someone had on ebay. i've seen that winplus posted before when searching but that one is on the weaker side, 200a/350a. the ravpower i have is 500a peak. this bestek deal is 600a and was also sold on amazon with good reviews and had an A fakespot grade. the bestek you have is actually 400a peak even though all the deal posts listed it as 600a. before i'd recommend the bestek to someone looking for a deal but i'll probably tell them to spend some more and get a ravpower or something like that.
I wonder if anyone's done any real reviews of such chargers, beyond seeing if they start up a dead battery. I.e. attaching them to serious lab equipment and subjecting them to extreme conditions repeatedly, to see what their weak spots and breaking points are. And maybe opening them up to see the circuitry inside. The way that PC power supplies are tested and reviewed. It seems like a lot are substandard. I once had to open up and fix an older lead acid battery-powered charger that also had some bad circuitry. There don't seem to be the same standards for battery-powered devices these days as there are for AC-powered ones that get UL tested and such. So, buyer beware, and stick to known brands that got good reviews.
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#8
Quote from KMan
:
I wonder if anyone's done any real reviews of such chargers, beyond seeing if they start up a dead battery. I.e. attaching them to serious lab equipment and subjecting them to extreme conditions repeatedly, to see what their weak spots and breaking points are. And maybe opening them up to see the circuitry inside. The way that PC power supplies are tested and reviewed. It seems like a lot are substandard. I once had to open up and fix an older lead acid battery-powered charger that also had some bad circuitry. There don't seem to be the same standards for battery-powered devices these days as there are for AC-powered ones that get UL tested and such. So, buyer beware, and stick to known brands that got good reviews.
there's actually a lot of tests/reviews on youtube but they seem to be all over the place. when you google for reviews, they're mostly positive because the companies gave them free units so that's why. i think someone opened up a noco one and something was only rated for 70a but it's suppose to be 1ka peak haha. those noco cost quite a bit more too. well i rather pay a little more for something like this https://slickdeals.net/f/10675584-ravpower-portable-car-jump-starter-power-bank-14-000-mah-550a-peak-current-with-built-in-led-flashlight-5gc-43ac?src=SiteSearchV2_SearchBarV2Algo1 over a bestek which just showed up this morning. quality on that will be better than one of these bestek but then we also know bestek also does the job. i saw an old post about a beatit on amazon with qc3 and it was like $35 or so. that's a deal but then just like the psu's, there's a few oems that make all the top brands and then after that you get what you pay for. the older model ravpower i got off ebay for $40, i know that works so i'll have peace of mind. i rather pay $40-50 for a quality brand than like $70 for overpriced noco which is good quality too. i would trust aukey too but their jump starters are on the weaker side. i think anker used to make some too but i don't see it anymore.
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Quote from jdpower619
:
there's actually a lot of tests/reviews on youtube but they seem to be all over the place. when you google for reviews, they're mostly positive because the companies gave them free units so that's why. i think someone opened up a noco one and something was only rated for 70a but it's suppose to be 1ka peak haha. those noco cost quite a bit more too. well i rather pay a little more for something like this https://slickdeals.net/f/10675584-ravpower-portable-car-jump-starter-power-bank-14-000-mah-550a-peak-current-with-built-in-led-flashlight-5gc-43ac?src=SiteSearchV2_SearchBarV2Algo1 over a bestek which just showed up this morning. quality on that will be better than one of these bestek but then we also know bestek also does the job. i saw an old post about a beatit on amazon with qc3 and it was like $35 or so. that's a deal but then just like the psu's, there's a few oems that make all the top brands and then after that you get what you pay for. the older model ravpower i got off ebay for $40, i know that works so i'll have peace of mind. i rather pay $40-50 for a quality brand than like $70 for overpriced noco which is good quality too. i would trust aukey too but their jump starters are on the weaker side. i think anker used to make some too but i don't see it anymore.
I'm not an electronics expert by any means but the electronics behind consumer jump starters doesn't appear to be that complex. So, even cheaper and lower-quality will probably get the job done, initially at least. But over time the cheaper stuff will break down, especially if you try to start bigger batteries, and often.

I'm guessing that most units are put together by assemblers who buy the individual components in bulk, e.g. LiPo batteries, circuit boards, cables, clamps, cases (custom-made) and put them together. Whatever quality control takes place is probably at the component maker level. The same is probably true of other commodity items like cell phone chargers and power banks, PC power supplies, low-end drones, etc.

I'm personally ok with saving money on lower-end stuff, as I can usually fix it unless it's truly awful, in which case I just return it for full refund. But, most people just want stuff to work and not have to worry about diagnosing and fixing things. So it's worth paying a bit more.
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#10
Quote from KMan
:
I'm not an electronics expert by any means but the electronics behind consumer jump starters doesn't appear to be that complex. So, even cheaper and lower-quality will probably get the job done, initially at least. But over time the cheaper stuff will break down, especially if you try to start bigger batteries, and often.

I'm guessing that most units are put together by assemblers who buy the individual components in bulk, e.g. LiPo batteries, circuit boards, cables, clamps, cases (custom-made) and put them together. Whatever quality control takes place is probably at the component maker level. The same is probably true of other commodity items like cell phone chargers and power banks, PC power supplies, low-end drones, etc.

I'm personally ok with saving money on lower-end stuff, as I can usually fix it unless it's truly awful, in which case I just return it for full refund. But, most people just want stuff to work and not have to worry about diagnosing and fixing things. So it's worth paying a bit more.
great points once again. i'm usually the lazy one that would rather pay a little more than to fix something, haha. i actually opened up my old ravpower and you can definitely see the battery bulged a little. i tried to look online to see if there's somewhere i could buy a cheap replacement but doesn't seem like it. i actually didn't see anything similar at all based on the specs here https://www.ravpower.com/support/.../view/Mjgz i'm guessing these type of batteries aren't even available for consumers? checked google/ebay/amazon, couldn't find anything. oh well, i got my other ravpower last night so now i just need to make sure i don't let it bake again!
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Quote from jdpower619
:
great points once again. i'm usually the lazy one that would rather pay a little more than to fix something, haha. i actually opened up my old ravpower and you can definitely see the battery bulged a little. i tried to look online to see if there's somewhere i could buy a cheap replacement but doesn't seem like it. i actually didn't see anything similar at all based on the specs here https://www.ravpower.com/support/.../view/Mjgz i'm guessing these type of batteries aren't even available for consumers? checked google/ebay/amazon, couldn't find anything. oh well, i got my other ravpower last night so now i just need to make sure i don't let it bake again!
I'm guessing that it's possible to buy replacement batteries for these things and that most use one of a handful of standard types, kind of like how the 18650 has become the standard for consumer LiPo-powered devices like phone power banks, flashlights and mini fans. Did you try eBay? I think someone mentioned the type of battery these things use upthread, or in a similar recent thread.

One feature that I wish these things had, either built-in or via a special adapter cable, that lead acid-based ones often have, is either a cigarette lighter and/or AC outlet (via a built-in inverter). These things are primarily meant to boost car batteries via clamps, but some cars can be boosted via their cigarette lighter jacks w/o having to pop open the hood, and it would be nice to have that ability. Plus a huge aftermarket of products exists that use cigarette lighter plugs, like vacuums, work lights, air pumps, etc. There are times you might want to use them away from your car.

An AC outlet might also be nice, for low-power AC devices like portable DVD players, non-standard laptop chargers, small radio/CD player, etc. But that would obviously add bulk, cost and complexity, and be one more thing that could break. With a cigarette lighter jack/adapter, though, you could accomplish this with a small inverter, which many people already own. Then again, an old, seldom-used Black & Decker portable power pack I bought years ago that's around the same size as these had a built-in AC inverter & jack, and it didn't cost that much.
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I found their amazon link, https://www.amazon.com/dp/B00ZZGE...star,maybe not a bad deal for $29.99
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I new a lady once that had something similar in her bedroom on her bedside table. I did not inquire.
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Quote from KMan
:
I got the other, green and black one a few weeks ago. It came at around 73% and took around 30-60 min to get to 100%. I then used it to start a car that hadn't been run in over a year with a completely dead battery. Took only a few seconds to turn over the solidified engine gunk and get it running. These things work. If this is more powerful, so much the better.

However, a big caveat. A different car had its battery die overnight, a much newer one with a smaller engine and battery. Tried to use the Bestek, and nothing happened, other than the warning light indicated a reverse polarity connection coming on with a continuous beep. I confirmed that the connections were correct and not reversed. Tried disconnecting everything and trying again, several times, with the same result each time.

Took the whole thing inside and on a whim, opened up the small circuit box that straddles the black/negative cable that connects the battery to the clamp. There's a whole bunch of discrete components on the circuit board, but most prominent were 4 power MOSFETS, model F2804S 2 each on either side of the board. Using a jeweler's loupe, it looked like a solder bridge connection between each pair of MOSFETs had been broken, probably by either a short circuit or overload, and there were signs of scorching.

I confirmed that they were supposed to be bridged by using a continuity tester between the MOSFETs on either side of the board (as opposed to the ones on each side), and they were indeed bridged. So I got a solder iron and some solder, and re-bridged each MOSFET pair, and closed up the circuit box. Took it back down to give it another go, and it immediately started up both cars.

So, these work, but are cheaply made. Most likely they're clever knock-offs of more established brands. I don't know how long my fix will hold up. If they're using cheap components elsewhere, something will go eventually, be it the actual MOSFETs (fairly easily replaceable though), a small cap, SMD components, traces, corresponding components in the battery unit, the battery itself, or the charger.

This is probably comparable to a cheap PC power supply. It'll work, for a while, but it won't last as long as the better ones.

Incidentally, as I finished typing this, the new Costco circular arrived, and it has a comparable device going for $50. Can barely make out the brand name and it looks like "Winplus". Unless money is SUPER tight, I'd go with the one from Costco or a better-known brand.

Ok, it's on their web site and available now at this price, till 11/22. Here's the link and some specs:

https://www.costco.com/Lithium-Ju...12116.html

Features:
  • High Output UL certified Jump Starter with Smart cable protection.
  • Heavy duty Aluminum case
  • 2 USB Ports for Fast Charging of Mobile Devices (2.1 A + 1.0 A)
  • 8000mAh High Capacity Power Bank
  • Recharges up to 1000 times
  • 3 Mode Flashlight

Product Specifications:
  • Product Dimensions: 5.43 x 3.03 x 1.06 in (138 x 77 x 27 mm)
  • Product Weight: 0.79 lbs (359g)
  • Capacity: 8000 mAh
  • Input: 5V 2A
  • Output: USB2.0; 5V 2A; 12V for car jump starter
  • Charging Time: 3 hours (varies depending on charger used)
  • Starting Current: 200A
  • Peak Current: 350A
  • Lifetime: Up to 1000 recharges
  • Operating Temperature: -4ºF ~ 93ºF (-20ºC ~ 34ºC)
  • Battery Charge Time: 3 Hour
  • Battery Voltage: 12 Volt
  • Brand: Winplus
  • Car Lighter Adapter: Yes
  • Color: Brushed Aluminum
  • Depth: 5.43 in.
  • Height: 1.06 in.
  • LED Indicator: Yes
  • On/Off Switch: Yes
  • Portable/Stationary: Portable
  • USB Compatible: Yes
  • Weight: 0.79 lbs.
  • Width: 3.03 in.
Package Includes:
  • Jump Start Power Bank
  • Smart Jumper Cable with Built-In Polarity Protection
  • 5V USB Car Charger
  • Micro USB Cable
  • User's Manual
  • Storage/Travel Case

I think I'll get one as an additional unit, and keep the Bestek.
For what ever reason the leads on Chinese jump packs are sacrificial. They can't draw power for long and over heat and either melt or just stop working. You can buy them on ebay and amazon.

Is the costco one on sale in stores?
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Quote from MichaelM3467
:
For what ever reason the leads on Chinese jump packs are sacrificial. They can't draw power for long and over heat and either melt or just stop working. You can buy them on ebay and amazon.

Is the costco one on sale in stores?
I saw it at a local Costco a few days ago before the sale kicked in so it was selling for $60, but it was available. I believe that the sale price did kick in some time ago online, and will kick in within a few days in stores. I decided to not get it though because one, it wasn't on sale yet, and two, it seemed a bit low-powered compared to ones selling for around the same or a bit more. Not just in terms of actual power, but also features, like power-out DC cables for laptops & cell phones, call charger, etc. But, I'm sure it's a decent unit.

One feature that is missing from most such units is a cigarette lighter jack adapter. Seem kind of obvious to want such a feature, so you can power 12v devices away from the car (and in my case essential since one of my cars has an electric hood lock that needs juice to work, and if the battery dies, I need a way to get to it which means power to the cigarette lighter jack!). Had to buy one separately on Amazon for $6.

If I do need to buy a better-made replacement for the jumper cable, what are they called so I can search for them? Too bad that they're low quality. We're not talking sophisticated electronics so it shouldn't cost that much to make properly. Hopefully the fix I applied will hold and nothing new will crop up.
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Last edited by KMan October 24, 2017 at 12:11 PM.
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