I have a 390TP and circuitry in the battery has failed. I need to get another battery. According to IBM there is no issue whether I get the Li Ion battery(02K6520 - 10.8v) or the Ni MH(02K6521 - 9.6v)as the machine manages the required voltage at a level less than those mentioned above.
Firstly, can both these batteries be used and if so is it true that the Ni MH is more stable? Secondly where would I be able to find a reputable dealer in the UK for a OEM battery?