Battery-powered Pi?

mgt6910 over 13 years ago

I would like to use my Pi on a robotic platform, for which an onboard power supply will be

necessary. I have a rechargeable 6-volt battery. How can I regulate this down to 5V ?

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morgaine over 13 years ago

Over on http://www.raspberrymod.com/viewtopic.php?f=60&t=640&sid=b006909c691d78e07788ff03dbf8526c I wrote a little piece about Lithium-Polymer batteries and the rising trend to integrate Li-Po chargers on microcontroller boards.

This doesn't help at all with Malcolm's question of course, but I'd like to ask a supplementary question in case someone here knows the answer. Is there a 2-cell Li-Po charger module (2 x 3.7V = 7.4V) available from anywhere, suitable for integration into 5V-powered equipment?
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michaelkellett over 13 years ago in reply to morgaine

@ Morgaine,

Li-Po batteries are fussy things and you might suffer from tolerance stack up or balance problems if you charge in series (although lot's of battery packs must do this).

Why not use a boost converter to generate the 5V you need from the battery's 4V or so?

Boost converters are simple, small, cheap and quite efficient.

If you can give me a spec I'll suggest something specific.

Michael Kellett
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mgt6910 over 13 years ago in reply to michaelkellett

Many thanks for the suggestions, I guess I'll start with an off-the-shelf charger, I may well get a longer run-time than with my 6V battery.
Now how to change the status here to answered ??
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Former Member over 13 years ago in reply to mgt6910

Malcolm,
At the top of the original post, just under the title, there should be
a link you can click on that says "mark as assumed answered".
Also, at the bottom of each response, there are two boxes you can
click, one for "correct answer" and one for "helpful answer".

Any correct or helpful answer you click on will get automatically mentioned
in the original post.
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Former Member over 13 years ago in reply to mgt6910

Malcolm,
At the top of the original post, just under the title, there should be
a link you can click on that says "mark as assumed answered".
Also, at the bottom of each response, there are two boxes you can
click, one for "correct answer" and one for "helpful answer".

Any correct or helpful answer you click on will get automatically mentioned
in the original post.
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