ALLPOWERS 20800mAh Portable Charger, 4.5A Output & 2A Input for $15.94 w/code + free shipping

2.8 oz? No way...

If you're looking on mobile you need to slide on the info sheet. The 2.8oz figure is for a small lipstick sized battery pack.

The moment I held it in my hand I felt it was too light compared to my 10,000mah external battery. So I pried it up and saw a label on the cell which claims to be 8.14WH at 3.7v which calculates to 2,200 mah cell. Now there are 7 cells inside total so at most it has 15,400 mah which is nowhere near 20100 mah capacity that it claims.

Also none of the cells inside are recognized to be trustworthy brand. Which creates another doubt on the printed capacity on the cell itself. The battery cell's label claims to be 2,200 mah but is it true?

To further investigate this, I will test individual cells on a battery tester to find out what is the true capacity of this lying-piece-o-shit battery pack.

TL;DR the ALLPOWERS 20800mAh power bank falls very short, ~51% of the reported capacity. It was also missing a micro USB cable. Would not recommend.

ALLPOWERS claims 20800mAh

I'm assuming the 20800mAh is for the native capacity of the 3.7V cells

The actual capacity of this power bank is around 20800 * 3.7/5 * .9 ~ 13852.8 using a 90% converter efficiency.

Straight out of the box The power bank came charged to two solid LEDs. I charged the power bank to full overnight. I charged one device at a time using the 2.4A port with an OEM Apple lightning cable. The devices were not in use during charging. These were the results of my test:

iPad mini from dead to 98%
iPhone 7 Plus from 80-98 ~ 18%
iPhone 7 Plus from 75-97 ~ 22%
iPhone 7 Plus from 40-95 ~ 55%
iPhone 7 Plus from 77-97 ~ 20%
iPhone 7 Plus from 81-98 ~ 17%
iPhone 7 Plus from 76-89 ~ 13% <--- The power bank died at this point.

iPad mini 2 has 6470mAh capacity and the iPhone 7 Plus has 2900mAh capacity. I'll be generous and say the iPad was charged from dead to 100%. The iPhone charged a total of 145% ~4205mAh

6470 + 4205 ~ 10675mAh leaving 3178mAh short of a 90% converter efficiency of 20800mAh.

10675mAh of the reported 20800mAh ~ 51%

I used four meters: Battery Pro app, Battery Life app and two different USB meters.

Whether I plug into the 2.1A or 2.4A port, the meters read as 2.4A. The voltage ranged from 4.19-4.28V for both ports. Power reads 12W per port.

The description also says that you get two micro USB data cables. I only received one. I will be returning this product and looking into Anker and Aukey.

I've never heard of this brand. Anybody want to comment on it.

TL;DR the ALLPOWERS 20800mAh power bank falls very short, ~51% of the reported capacity. It was also missing a micro USB cable. Would not recommend.

ALLPOWERS claims 20800mAh

I'm assuming the 20800mAh is for the native capacity of the 3.7V cells

The actual capacity of this power bank is around 20800 * 3.7/5 * .9 ~ 13852.8 using a 90% converter efficiency.

Straight out of the box The power bank came charged to two solid LEDs. I charged the power bank to full overnight. I charged one device at a time using the 2.4A port with an OEM Apple lightning cable. The devices were not in use during charging. These were the results of my test:

iPad mini from dead to 98%
iPhone 7 Plus from 80-98 ~ 18%
iPhone 7 Plus from 75-97 ~ 22%
iPhone 7 Plus from 40-95 ~ 55%
iPhone 7 Plus from 77-97 ~ 20%
iPhone 7 Plus from 81-98 ~ 17%
iPhone 7 Plus from 76-89 ~ 13%

I've been looking around for a decent power bank that allows pass through and from the Q&A it seems this model does support it, BUT these 2 reviews kinda turned me off on this:


Good lord someone hire this man to do professional reviews. The hero we need.