Disclaimer: Everything written here is from personal experience and experimentation. Take it with a grain of salt. Well, now that I can't be sued for writing this, let's get on with the review shall we?
I'm just gonna come out and say it. This thing is, in my opinion, a piece of shit. Outright. The seller claims a 2600mAh capacity. On an IPhone 4, which I own and have tested this on, there is a battery that has a 1420 mAh battery.
When I attempted to charge my phone battery, after completely charging this power bank. The stored power in the power bank ran out around 52%. This means that I only got back about 710 mAh, but worse than that, It also means that this thing is approximately 27% efficient. What the actual fuck?!
This thing also heated up pretty intensely while it was charging which makes me think that indeed, it is highly inefficient. I've seen gimmicky "solar power banks" on Youtube with higher experimental efficiency ratings than this thing.
To this thing's credit, the rest of the claims on the manufacturer's website hold up. It does charge phones and small electronics, albeit not very well, in my opinion ,it looks nice with the metal finish, and the LEDs accurately indicate how much power is left in the thing.
But with that said, power banks don't have to be that durable. Call me crazy but generally, treat your power bank as carefully as you treat your phone's screen and it'll be more than fine. The two are usually not far when you're out and about. A power banks entire job is to store power and give it back to you when you need it.
This thing, in my experience, sucks at its job. The best attribute of this power bank is being able to take a beating that it, in most cases, it shouldn't be suffering in the first place. This is a power bank that fails at it's one and only job, and succeeds at the one it will never be given.
Avoid this product if you're looking for a power bank that can fully recharge your IPhone, Samsung etc. If you have a flip-phone, slider, or really any "dumb phone" then go for it. Actually, don't any other power bank is still a better choice.
Found it going for $29,99 on Amazon (who are they shitting come on we all know it's $30) and $34.99 on the manufacturer's website as of the day of this posting. You wouldn't want to buy it, so i'm not going to link it.
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