Delivery side a priori any worries. The battery has been filed in the box letter on time. When I unpacked, I noticed a small scratch that scared me, but in the end all goes well, it's just the aesthetic side which takes a hit but that's not what m 'interested in this product so I do not hold that against ... I use it to charge my phone, of course, but also to provide power to my raspberry pi (5V, 1A / 2.1A: ideal). Eventually I plan to use the same 12V output by coupling it to an HDMI display (hdmipi), so I would not even need to change the battery! This is one of the only product I found capable of providing both power supplies simultaneously. To use it is simple, there is a small button that launches the load (I was scared by plugging my thing for the first time to see that nothing happened XD), and once your device charged, the power turns off. In my case with the raspberry pi, it's a little embarrassing, I would have preferred just the button allows to load / unload, so he could serve as a "power" button like on most computers. Out there unfortunately it only allows you to turn but to turn off because it is automatic (but with the feet it does not work when I turn it off it still consumes a bit leaving the LED lit, so I have to disconnect / reconnect the power to really stop). : / Side indication of the battery charge is good, but it could have been even better. Roughly speaking, here, if we still indicates 0% (no lit blue light), between 1 and 25% (1 lit), between 25 and 50% (2 lighted), between 50 and 75% (3 on) and between 75% and 100% (4 lit). That's good, but it's hard to know when we reach extreme with this system. I have a friend who has another battery (less powerful, but he got it to 24 euros, 2 times), and above it says the percentage of remaining battery by pressing a button altogether, and here c is super handy to know for example if there is only 2%, or we charge 99% ... See what I mean? Because between 1% and 25% under the current system can not see the difference, and it's a little dangerous, especially for people like me who seek to continuously supply a device, not knowing exactly when will miss juice (especially 1% and 25% to 5V and 1A for a battery with capacity of 15A, it is equivalent to between 10 minutes and 3h30, so it's really a big range).
But otherwise very very satisfied with the product, I'm just waiting for my screen from another supplier and this will be perfect. :)
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