The batteryes usual start leaking when the computer ends up not beeing used for a while (a few months) and you will usualy see the problem with A2000s as most of the time you will get these from people/companies wich have fased them out a good while ago its a big problem for people thinking "nah id rather collect it in the closet then sell it" before that is done people should really remove the battery! a while ago i was thinking of macking a small hack to make them able to use coin shapped batteryes but the market and interest for bix boxed Amigas/and amigas in general have dropped (at least here) so now instead i remove them and sell them without batteryes.