Hi,
folks on here seem to know a lot about batteries and im wondering
if there is such a thing as a "D" cell NiMH "battery bank" where you
just plug in rechargeable D - NiMH batts into some kind of a case
that would power/charge a Nokia N800 or even a laptop computer..

These D cell NiMH rechargeables are up to 12,000 mAH capacity
now, just four of them would equal my laptop's standard battery
and would be fairly convenient to use for that application or
for charging my N800....i have searched the internet, cant find
or dont know what they would be called, anyone have any
thoughts?