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Damn "intelligent" power banks. I want to power an arduino off of those but after a short while the power bank cuts off the power because it's thinking that the smartphone's battery is full and doesn't need to charge anymore. In this case the micro controller is soo power efficient that it draws so minuscule amount of current that the power bank goes to sleep.
Thursday, 23-Jun-16 09:25:44 UTC from web-
@adiwan I guess you could always take a dremel to it and attach your arduino directly to the battery leads. If the Arduino power requirements are such low amps then you can just leave the rest of the internals as they are, heck you can probably even charge it while it is operating. The only problem is, how do you make this look both nice and safe ? My guess, negative to wire that you'll just dangle outside of the case through a hole, and positive to a rocker switch that you'll just dange outside of the case through a hole.
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@critialcloudkicker That's an option. I'd rather return the powerbank and get my money back before I open and destroy it. On the other hand I got 3 powerbanks with 2600mAh for 9€.
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@adiwan Yeah, it is always a bad idea to open up and mess with things you can return to the store. Especially if the draw of your Arduino is so very low that you can probably get somewhere around 700 hours on a 2600 mAh powerbank of 3 Euro. ( not calculating power-loss, and assuming the "F it I will go to sleep" is around 4 mA powerload or under )
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Even with a small 1'' OLED display and a RF transceiver module attached the current draw is so small that the powerbank shuts off. A 3'' LCD display on full brightness doesn't trigger that function. Originally I wanted to use the powerbanks for my DIY RC car remote
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