Rod Speed ha escrito:

..

Pity they arent practical with external chargers because of the
real problem with RECHARGEABLE lithium batterys in that format.

There's a reason they go bang if not RECHARGED properly.

That´s why the manufacturer puts the charging circuit *inside* the
cellphone or the laptop, to avoid charging problems. Also, the IPOD
battery is a lithium rechargeable one, so a lithium battery charging
circuit can be made as small as needed. Put simply: if the manufacturer
*wants* to design a product with batteries that can be replaced or
recharged the manufacturer *can* do it. The technollogy exists, and in
fact it´s in use actually. Even there are different chemistries
available, so if an applicattion works best with a NiMh battery, or a
NiCad one, that battery can be used.