adafruit wrote:you will not be able to charge at any reasonable speed with a panel that small. the ones we have in the shop are pretty much the minimum necessary
Thanks for the reply. Oh i fully understand that any smaller panel then the 6v@1w wouldn't get much charging done. i am not wanting it for fully recharging the lipo from nothing, just a little top off here and there. Right now im using a ipod battery in my main mbs and i rarely use it for more than ten mins or so. Also any help on which zener i would need if that would work at all ?
I have a sgs phone and sometimes i need just a few mins boost to get me through the work day. so i have yet to have to run the battery all the way down. If i did need all the power it had then i would of course recharge it via wall. But for those times when i only drain five to ten mins off of it every few days i thought a small panel would be enough.
The only reason i want to build one with the 6amp lipo with solar and wall recharge options is mainly for the fun of it. As far as all i really need, the twin aa version is more than enough. I purchased twelve mb kits from here and the parts for two custom ones from digikey and had fun making toys that went out as Christmas gifts.
Anyway my point is none of what i am doing is reasonable (in my case at least), just fun. If a 2" x 3.5" panel can recharge over the course of two or three days of light then i would be happy.