I have them in a bunch of capacity's, it really just depends how much space i have but this probably gets the most usage
For longer battery life ill use the 2400ma version but it's kind of bulky and doesn't fit most cases
Amazon is not the cheapest place to buy them but its the quickest place to find. Make sure what ever you get has protection circuit built in.
There is one problem with using lipo's like this, the dc dc converter will keep running and drain the battery well past its safe limits and i have killed one or two batteries this way. You can tell when the battery is getting low because the step up converter starts acting weird and you will hear the distortion. My advise is to just remember to recharge long before the battery fully drains. with 900ma and the 80% efficient dc converter and depending if you run the cmoybb v2 in class A i get about 15 to 30 hours of play time so other then leaving it on over night it feels like i never have to recharge them. BTW the 900ma battery (with protection circuit that adds a few mm length) will fit in a AA battery holder.
Oh and the power switch needs to go between the batt+ and anything else. Depending on the charger board they sometimes slowly drain the battery if its left plugged in so its a good place for the switch.
Edited by bootdsc - 4/6/14 at 1:06am