Review: EasyAcc 15000 mAh Powerbank

This is my review of EasyAcc® 15000 mAh Powerbank. In this review I will provide you with the things that matters most when we are talking about gadgets  - consumer experience.

In the box you get: powerbank, 2 USB to micro USB cables and user manual (read it first!).

Powerbank is quality build and the surface is covered with black rubbery - smooth plastic (similar to Nexus 10 rear side).It's fingerprint friendly (no fingerprints left on the device). On the front side of powerbank, there are 4 USB output ports for charging your devices. On the edge of the smooth plastic surface are four indicators for battery level. Each indicator represents 25 % of power capacity. Using powerbank is very easy, just connect device you want to charge and it will start charging automatically. If for some reason doesn't start to charge, just press the power button. During charging, indicators show you how much battery power is left in portable charger (4 indicators for 75 - 100%, 3 indicators for 50-75 %, 2 for 25-50 % and 1 indicator for 0 -25 % of battery level).

Firstly I fully charged powerbank and then take it to the first test. In this test I evaluated the efficiency ratio of the powerbank. In the first discharging cycle I charged separately : iPhone 5S from 20-100 %, Nexus 10 from 15-100% (airplane mode) and iPad mini Retina from70 - 100% and first generation ipad mini from 50 - 72 %. Both ipads were on airplane mode. After that powerbank ran out of power.

Device battery size:

iPhone 5s: 1570 mAh

Nexus 10: 9000 mAh

ipad mini retina: 6471 mAh

first generation ipad mini: 4490 mAh

80 % of iPhone 5s battery represents 1256 mAh, 85 % of Nexus 10 battery represents 7650 mAh,30 % of ipad mini retina battery represents 1941 mAh and 22 % of first generation ipad mini battery represents 988 mAh. Combining all mAh together, we get 11 835 mAh.

Efficiency ratio for powerbank is 78,9 %. This efficiency ratio is very good, especially if we know that this was only the first fully discharging cycle. Battery will probably be even better after few discharging cycles. I have no complaints over efficiency ratio, on contraryI think it's great.

Even if you aren't charging devices, you know when powerbank is empty. Just press the power button and 1 indicator will start to blink. This means that battery level is below 5% and you can't use it for charging.

Charging time for EasyAcc Powerbank from empty to 100 % was 9.5 hours, using EasyAcc Desktop Charger with 2.4 A output.

In first test I charged devices separately, one by one. There were no overheating problems, actually there wasn't any noticable change in temperature (like it is,when powerbank is off). With the next test, my intention was to evaluate, if there are any overheating problems, when you are charging four devices at the same time. For this test I charged three tablets and a smartphone. It was the same story again.When I was charging four devices at the same time, there wasn't any change in temperature. Powerbank charged all four devices with no problem whatsoever. During test I also noticed that charging speed decreases when we are charging four devices simultaneously. iPhone 5s needed 2h and 10 minutes (30-100%). When I charged just iPhone 5S it took 1h and 40 minutes. For me it's quiet understandable that powerbank will charge with decrease in speed, because it has a lot of capacity to charge from four USB outputs simultaneously.

Conclusion: Overall powerbank is a great device.I recommend this powerbank to anyone who are going on camping for a weekend etc. and don't have access to wall socket. This powerbank will have you covered. I am also very satisfied with effieciency ratio of the device (almost 80% with the first cycle). Many times we buy some powerbanks with huge capacity, but when you charge the devices you get only half of that supposed capacity power. That's not the case with this charger.If you want to stop charging devices for a moment just press power button. When you want to continue charging, press power button again. Would like to see some included pouch for carrying the device.