matbos
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Power from portable mobile charger

Sat Dec 27, 2014 8:05 pm

Would a mobile charger like this: http://www.ebay.com/itm/2600mAh-Portabl ... 418a28d8d6 be suitable for powering a raspberry pi?

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FTrevorGowen
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Re: Power from portable mobile charger

Sat Dec 27, 2014 10:00 pm

matbos wrote:Would a mobile charger like this: http://www.ebay.com/itm/2600mAh-Portabl ... 418a28d8d6 be suitable for powering a raspberry pi?
Seems to be a variant of this one:
http://www.cpmspectrepi.webspace.virgin ... rBank.html
which has a "marginal" load characteristic - probably O.K. for an A+
FWIW, I'm use these two regularly, which have higher capacities and thus give reasonable "running times" (long enough for use at an "afternoon Jam"):
http://www.cpmspectrepi.webspace.virgin ... arger.html
http://www.cpmspectrepi.webspace.virgin ... Power.html
Trev.
Still running Raspbian Jessie or Stretch on some older Pi's (an A, B1, 2xB2, B+, P2B, 3xP0, P0W, 2xP3A+, P3B+, P3B, B+, and a A+) but Buster on the P4B's. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

matbos
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Re: Power from portable mobile charger

Sat Jan 03, 2015 5:26 pm

Thanks for your reply, I have an old model B (250mb ram). Would the power suply i mentioned work on it? Even if only for two hours?

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FTrevorGowen
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Re: Power from portable mobile charger

Sat Jan 03, 2015 7:57 pm

matbos wrote:Thanks for your reply, I have an old model B (250mb ram). Would the power suply i mentioned work on it? Even if only for two hours?
So long as the Pi + any USB peripherals are drawing ~700mA (and your power bank still provides ~4.75V) then you ought to achieve ~2 hours** running time. The disadvantage of that style of powerbank is that they do not provide any indication of the charge remaining (whereas the two I use have a four or five led "bargraph-style" display**) and you may suffer power failure when you least expect it!
Trev.
** Which was showing ~half-charge at the end of the "~2hr afternoon jam" I mentioned in my previous post.
Still running Raspbian Jessie or Stretch on some older Pi's (an A, B1, 2xB2, B+, P2B, 3xP0, P0W, 2xP3A+, P3B+, P3B, B+, and a A+) but Buster on the P4B's. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

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