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Selectec 24000mAh Ultra High Capacity Portable Power Bank for $17.74 w/ free shipping on Amaozn

$17.74
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Amazon [amazon.com] has this Selectec 24000mAh Ultra High Capacity Portable Power Bank on sale for $24.99, apply coupon code SELTCE14 to drop the price to $17.74.Shipping is free.
  • Equipped with dual smart identify USB output ports(5V 2.1A / 5V 1A), It can charge 2 digital devices at the highest speed simultaneously. Product Size: 3.15 x 6.3 x 0.79 in
  • 5 Security systems: IC Protection for over-charging, over-discharging, over-voltage, over-current and short-circuit. Safety guarantee for your devices
  • Power on / off automatically when plug / unplug the USB cable from Device. 5 Integrated LED indicators show you the power level and charging status. Built-in LED flashlight makes it easier use in the dark.
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Created 12-03-2017 at 05:44 PM by SheldonKite
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25 Comments

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#2
Takes forever to recharge
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#3
Good for Nintendo switch?
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Our community has rated this post as helpful. If you agree, why not rep Consoleking1?
#4
Quote from songssam
:
Takes forever to recharge
It also takes forever to fully deplete it. Charge overnight, bada bing
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#5
Quote from songssam
:
Takes forever to recharge
No idea the quality of this item, but based on your comment it can take forever...

Normal charging 500 ma: 24000/500ma = 48 hours to charge

Fast charging at 2 a: 24000/2000= 12 hours

Fast Charging at 2.4 a: 24000/2400= 10 hours.

But.... it will deplete at one of those rates or in between as well (give or take 20-30% for battery inefficiency).
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#6
That's a lot of 1-star reviews for a product with only 71 existing reviews...
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#7
this has no chance of 24000 mAh, i highly doubt they use 3000 mAh cells.

Charging time can't be look at by simply dividing the numbers, the charge moves in a curve, if this thing is max at 1A 5V input, it would take a while, most likely this is about 2400 X8 = ~19000 mAh.

at 5W, we might be looking at about 5-6 hours for a full charge. Not "forever" but it could be over night.

The more expensive pack is more convenient, you really need fast charge on these packs because of high capacity.
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#8
Quote from warlock110
:
this has no chance of 24000 mAh, i highly doubt they use 3000 mAh cells.


Also....No way they are using brand named 3000mAh 18650 cells at < $2 a cell.
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#9
In don't think these use 18650s. Lithium Polymer is less expensive.
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#10
If it is the same as the one we have, it's charging rate is pretty low that if you are using your phone while charging the battery level will just keep dropping, instead of increasing.
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#11
Quote from Consoleking1
:
It also takes forever to fully deplete it. Charge overnight, bada bing
Doesn't charge just overnight.... Takes even longer. Bada Boom!
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#12
Quote from warlock110
:
this has no chance of 24000 mAh, i highly doubt they use 3000 mAh cells.
Quote from bads3ctor
:
Also....No way they are using brand named 3000mAh 18650 cells at < $2 a cell.
Lol, yea, I opened this thread to see if it was actually 24ah. Seeing as how the highest capacity 18650 cells are slightly greater than 3000mah, that would mean this pack is built using 8x of the highest capacity cells on the market. Granted that these cells will cost $10+ each brand new, there is no way that the cheap cells they use will be anywhere near 3000mah each.

If we were to up the voltage to 5v which is what the USB operates at, the original stated capacity at 3.7v is now a fraction at 5v. This 24000mah pack should be more like 8000mah on a good day. Those 9000mah Ultrafire 18650 batteries on ebay have been tested at anywhere from 100-900mah.
Quote from r3a1ist
:
In don't think these use 18650s. Lithium Polymer is less expensive.
Look at the casing and the weight. It weighs about 1.02lbs and 18650s usually weight about 1.5-2 oz each. The shape of the case also implies that 18650s are used.
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Last edited by NE0tekk December 3, 2017 at 09:26 PM.
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#13
That is the problem with all of these rechargeable packs, most of them use standard sized batteries because they are cheaper (you don't have to special order) and they already have the charging software almost perfected for them.
So when you have something that claims amp hours that are way off the charts for the size it makes you wonder, and the more research you do the more you'll find out there is a lot of deception going on about battery capacity. I think the reason is simple, market pricing. Make quick money on fake specifications and move to another product before they all get recalled.
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#14
Quote from amptric
:
Good for Nintendo switch?
No - you want something supporting USB-PD. $70 and up.
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#15
what are Grade A Li-Po cells
i know with Li-Ion it means Sanyo Panasonic or LG
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