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Prime Members: 60,000mAh ROMOSS 22.5W PD Fast Charging Portable Power Bank Expired

$35
$89.99
+ Free Shipping
+27 Deal Score
75,199 Views
ROMOSS Direct via Amazon has for Prime Members: 60,000mAh ROMOSS 22.5W PD Fast Charging Portable Power Bank on sale for $34.99 when you clip the 50% Off coupon on the page. Shipping is free.

Thanks to Staff Member DesertGardener for sharing this deal.
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About this Item:
  • Ultra-High 60000mAh Capacity Power Bank delivers multiple charges to smartphones, tablets and other USB-powered devices. Delivering over 12 charges to iPhone 15/14, 10 to S23, and 5 to iPad powering your devices for week on end during trips
  • Fast Charging and Universal Compatibility supporting 18W PD and QC output, compatible with all major fast charging protocols, enabling fast charging for Apple, devices and more. The easy-to-read LED display keeps track of the power status
  • Multiple Charging Options; 4 outputs, 3 inputs Charge multiple devices simultaneously with two 5V/2.4A USB ports, one Type C port, and one USB fast charging port. 3 power bank charging inputs: Micro USB, Lightning, and USB Type C
  • The Romoss PEA60 60000 mAh energy dense portable power station is designed as Indoor and Outdoor, Travel charger. Take it with you on your travels, outdoor adventures, or simply keep it in as backup charger for emergencies
  • Intelligent Safety Protection; The built-in multi safety system offers complete protection against over-heat, over-charge, over-current, over-discharge, and short-circuits

Original Post

Written by
Edited April 12, 2024 at 12:36 AM by
Romoss Direct via Amazon [amazon.com] has for Prime Members: ROMOSS 60000mAh Portable Power Bank w/ 22.5W Fast Charging on sale for $34.99. Shipping is free.

About this product:
  • 4 Outputs: 1 x USB A 22.5W fast charging port, 2 x 5V/2.4A USB ports, 1 x Type C port,
  • 3 Inputs: Micro USB, Lightning, Type-C ports.
  • 60000mAh Ultra-High Capacity
  • Digital Display: Read the battery status at a glance.
  • 12-month warranty
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Deal
Score
+27
75,199 Views
$35
$89.99
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Featured Comments

Here is the physical size compared to a verified TalentCell Battery [amazon.com] that has 156wh/42,980mah. Certainly appears to be able to hold 222wh/60,000mah. The weight is also comparatively heavier as well.

I can also now confirm that my 45watt USB-C wall charger will only charge this to 86%, but my Macbook Charger that is 87watts is good enough to get it to 100%.

I have no clue how many people seriously claim to be experts here and just present opinion as fact over and over.
From reading the description, they're using Lithium Polymer cells in this instead of Lithium Ion.

Personally, I've tried to avoid LiPoly for going on close to 20 years.

They have way too many downsides compared to Lithium Ion, starting with the fact that they are even less shelf stable.

It also doesn't sit well with me that they're incorrectly telling people to "calibrate" the battery by fully depleting it.

Remember, people: Lithium based batteries do not have a memory effect and thus can't be calibrated through power cycles.

All you're doing by depleting it fully is stressing the battery, which actually causes it to not hold a charge as well.
Everything you said is accurate AND this isn't a single cell battery, it's a multi-cell battery pack that needs a Battery Management System (BMS). It's also a butt load of energy so it will have charge/discharge protection. In other words 0% isn't truly 0%, and it won't burst into flames if you leave it on the charger at 100%. The BMS monitors individual cells in the pack to achieve this protection.

It's common for batteries in a pack to have different states of charge (e.g. 4.05v, 4.12v etc). In those situations it's common to rebalance individual cells to bring the voltages in sync either by top balancing or bottom balancing cells.

A lot of Battery Management Systems have an automatic rebalancing algorithm that will do a bottom balance when you discharge the pack below 10%. Because this pack has discharge protection, 0% on it's gauge is likely just the threshold where it cuts off but isn't truly depleted. And discharging to 0% would trigger the bottom rebalancing.

It's also possible this is cheap Chinese crap and will burn your house down. Smilie

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Joined Sep 2018
L6: Expert
> bubble2 1,375 Posts
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slimdunkin117
04-12-2024 at 07:59 AM.
04-12-2024 at 07:59 AM.
Quote from Lakers01Life :
what brand / product did you end up getting?
you can try this one, it has a 40% coupon
Portable Charger Power Bank, 50000mAh Power Bank 22.5W PD and QC 4.0 Quick Charging with 5 Outputs & 3 Inputs,LED Display External Battery Pack for iPhone,Samsung,Tablet, iPad etc https://a.co/d/1F84RAx
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L6: Expert
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Slacky
04-12-2024 at 07:59 AM.
04-12-2024 at 07:59 AM.
"Frequently returned item
Check the product details and customer reviews to learn more about this item"

Battery nerds chimed in on the 1-star reviews, this is a no-go for me.
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> bubble2 1 Posts
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barry.garman
04-12-2024 at 09:12 AM.
04-12-2024 at 09:12 AM.
Bad link?
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> bubble2 539 Posts
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OPTICSOURCE
04-12-2024 at 09:54 AM.
04-12-2024 at 09:54 AM.
Great for multi-devices around the campfire

(and probably for lighting the campfire as well)
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Joined Oct 2013
L8: Grand Teacher
> bubble2 3,421 Posts
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This user is an Expert in Home & Home Improvement
wherestheanykey
04-12-2024 at 10:31 AM.
04-12-2024 at 10:31 AM.
Quote from CamTech :
I purchased a previous deal on this brand of power bank and returned it. I was getting nowhere close to the stated capacity and it would say it had 40% left and suddenly die. "Calibrating" did not help.

It went back and I got another brand of battery that works perfectly and gives the correct capacity and discharges as it should.

Did you read my comment?

You're not supposed to calibrate any lithium based batteries.

They don't have a memory effect, so there's nothing to calibrate.
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cptskippy
04-12-2024 at 12:08 PM.

Our community has rated this post as helpful. If you agree, why not thank cptskippy

04-12-2024 at 12:08 PM.
Quote from wherestheanykey :
It also doesn't sit well with me that they're incorrectly telling people to "calibrate" the battery by fully depleting it.
Everything you said is accurate AND this isn't a single cell battery, it's a multi-cell battery pack that needs a Battery Management System (BMS). It's also a butt load of energy so it will have charge/discharge protection. In other words 0% isn't truly 0%, and it won't burst into flames if you leave it on the charger at 100%. The BMS monitors individual cells in the pack to achieve this protection.

It's common for batteries in a pack to have different states of charge (e.g. 4.05v, 4.12v etc). In those situations it's common to rebalance individual cells to bring the voltages in sync either by top balancing or bottom balancing cells.

A lot of Battery Management Systems have an automatic rebalancing algorithm that will do a bottom balance when you discharge the pack below 10%. Because this pack has discharge protection, 0% on it's gauge is likely just the threshold where it cuts off but isn't truly depleted. And discharging to 0% would trigger the bottom rebalancing.

It's also possible this is cheap Chinese crap and will burn your house down. Smilie
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slimdunkin117
04-12-2024 at 12:18 PM.

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04-12-2024 at 12:18 PM.
Quote from wherestheanykey :
Did you read my comment?

You're not supposed to calibrate any lithium based batteries.

They don't have a memory effect, so there's nothing to calibrate.
you do need to calibrate the bms..it doesn't go heavily out of whack, but once a year is pretty routine..all lithium based batteries run in parallel and in series, and need a system to keep them at the same charge levels for each cell
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> bubble2 7,041 Posts
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AkujunkanX
04-12-2024 at 12:55 PM.
04-12-2024 at 12:55 PM.
Quote from MusicShark :
mah doesn't matter if they use low quality controller and/or low quality cells.

I see people vote on assumptions and no actual first hand knowledge still.
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AkujunkanX
04-12-2024 at 12:57 PM.
04-12-2024 at 12:57 PM.
Quote from MinhTrinh :
Where does it say it can take 65watt?

It was a user review as I stated, "...as multiple users reviews point out...".
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AkujunkanX
04-12-2024 at 01:04 PM.
04-12-2024 at 01:04 PM.
Quote from wherestheanykey :
It doesn't have an inverter, so how are you using a different charger with this?

You might have your units mixed up.

You didn't say anything that makes sense.

In simple terms, I'm saying your standard 5v 2amp charger won't charge this to 100%. Which is the reason why it has the bad reviews. It does not come with its own charger so folks are using whatever they have lying around. Unless you are a tech geek or just lucky to own a higher powered USB charger by happenstance, you probably use a generic USB charger that won't provide enough charge.

I haven't opened it up yet to inspect the internals so nothing definitive from me. I based my presumptions on verified user reviews and not pure assumptions.
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MKDas
04-12-2024 at 01:28 PM.

Our community has rated this post as helpful. If you agree, why not thank MKDas

04-12-2024 at 01:28 PM.
Quote from wherestheanykey :
From reading the description, they're using Lithium Polymer cells in this instead of Lithium Ion.

Personally, I've tried to avoid LiPoly for going on close to 20 years.

They have way too many downsides compared to Lithium Ion, starting with the fact that they are even less shelf stable.

It also doesn't sit well with me that they're incorrectly telling people to "calibrate" the battery by fully depleting it.

Remember, people: Lithium based batteries do not have a memory effect and thus can't be calibrated through power cycles.

All you're doing by depleting it fully is stressing the battery, which actually causes it to not hold a charge as well.

Actually what I think they meant is calibrating the BMS. Which is a common practice for larger power station like EcoFlow, Bluetti etc. It's to let the BMS know that this is the lowest voltage and this is the highest voltage. So that the BMS can correctly interpret the charge level and act accordingly.
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Last edited by MKDas April 14, 2024 at 06:51 PM.
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smartdvdproductions
04-12-2024 at 02:46 PM.
04-12-2024 at 02:46 PM.
On Amazon it says: Frequently Returned Item... That doesn't sound good...
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Tyler1989
04-12-2024 at 03:21 PM.
04-12-2024 at 03:21 PM.
Frequently returned item, impossible mah claims which cannot physically fit in device shell, and manufacture errors in product images and description. I'm thinking it's best to avoid this one.
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hz.lv
04-12-2024 at 03:21 PM.
04-12-2024 at 03:21 PM.
One common problem that many buyers never realize is that this power bank needs a high power usb charger to charge it to 100%. Otherwise it may stop at 88% or 90% and never increases. That's why many people returned it. A usb-c charger that comes with a laptop is power enough to charge it. Anyway, it is a great power bank, can use it for days or even weeks before re-charging. Not a true portable one, suitable to use at home or vehicles, camping, etc. Get a smaller power bank as portable bank, be able to take on plane.
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Squirrels8MyLunch
04-12-2024 at 03:30 PM.
04-12-2024 at 03:30 PM.
Quote from wherestheanykey :
It's likely 3x 1873129 cells.

These are supposedly LiPoly, not Lithium Ion.

Aren't lipos a massive fire hazard compared to lion? Sure for RC cars lipo is great as you want bang and you can keep them in fireproof bags. But shouldn't we store these just as safely as we do lipos for RC? Help thanks
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