@Gulfie
yes, yes - I know that Li-poly batteries are different, but they are a completely different construction to Li-ion and great if you want things like high draw current for flying model aircraft. The point is that the typical Li-ion batteries used in gadgets like phones and cameras are basically all very similar varying largely on capacity and the number of cells plugged together in series. Universal chargers are readily available for them. I'm not suggesting that cells using radically different chemistry are much the same.
For Li-poly you'd need a different sort of battery charger (or one that could handle both), just as is the case if you have Ni-Mh, Li-Ion batteries and lead acid batteries. The basic point is that comparable 7.2v Li-Ion battery from two different gadget manufacturers would essentially be interchangeable apart from the form-factor issue.


