It can go down to 3.5V (3.49 or so actually) without too much trouble.  3.7V should be fine for sure.  The power adaptor we used to use is 5V, but we're now also starting to ship some 4V ones (lower voltage is preferable if using the netDUO board, because it tends to get a lot warmer with a 5V supply).

C

On Oct 28, 2005, at 12:36 PM, Andy Triboletti wrote:

Doesn't the gumstix need 5V?  (that's what the power adaptor is, I think)  I'd be interested in how many hours a gumstix can stay running with one of these before a recharge, if someone ends up getting one.

On 10/28/05, Craig Hughes <craig@gumstix.com > wrote:
Just saw these.  They're designed to be iPod replacement batteries,
but they're 3.7V, nice and compact, and not too expensive, and this
one stores 2200maH which should keep a gumstix ticking for a nice
length of time:

http://store1.sonnettech.com/product_info.php?
cPath=44_82&products_id=156

C


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