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I'm looking to power a raspberry pi model 3 for a portable project. If I were to power it from a 10000mAh power bank (meant to charge smartphones), would the Pi be ok off this power supply, and if so, how long would it last on average? I am not looking to plug in any devices to the Pi, as my project solely requires software.

marked as duplicate by goldilocks Nov 27 '16 at 23:02

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migrated from electronics.stackexchange.com Nov 27 '16 at 22:45

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  • Part of the reason I'm closing this is because no one can promise you a power bank is going to work well with a Pi 3 without knowing some (probably not publicized) details about the power bank regardless of amperage. In general they are intended for recharging other batteries, moreover, via the intermediate circuitry of another device, a purpose which may have different and contrary requirements to powering active devices. In short: It's a gamble, you can try it, no one can promise you it will work, but it may or may not. – goldilocks Nov 27 '16 at 23:05

Try it and see! https://www.raspberrypi.org/documentation/hardware/raspberrypi/power/README.md suggests 400mA so (10,000 / 400) * (3.3 / 5) ~ 16 hours.

Unfortunately Power Banks differ widely in their ACTUAL performance.