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ottimo
I purchased these as an alternative to:- https://www.banggood.com/Dual-USB-5V-1A-2_1A-Mobile-Power-Bank-18650-Battery-Charger-PCB-Module-Board-p-1031593.html These are a bit more expensive but have some advantages. I intended to use these to power aurduino/photon projects and thus attached them to two ICR18650 cell wire in parallel. I get about 10hour +, Depending on current draw, and cell condition Charging:- I measured a draw of about 850mA at 5V, so a good quality phone charger over 1A should do nicely. A 3Amp Raspberry PSU should do very nicely. Note the indicator will read 100%, but it still need another hour before charging stops. The button on the side only turns on the display backlight/display mode and not the output power, unlike the above alternative. A quick double press turns on the white LED.Becasue the unit is 'Always on' it powers low power projects without 'Auto off' which I found the above alternative suffered from for my applications. It is much better finished and there is more space around the mounting holes, so it will be easyer to intergrate in to a box. I've not got much faith in the % level indication, so treat it as a rough guide. Overall nice unit, better finished and if you are need lower current output a good choice. Worth the money.