>> Also, it has NOT the standard Mac battery as Tim says, but an alcaline
>> block 4.5V (IIRC) with a small power chord. Some PC's used that and 
>> the
>> 6210 has the same battery.
>
> Ah, that's right. The 4400s were a really weird breed.

hi,

i'm sorry, i also sent a false information on this machine... :(

altho i've been working with Macs for 15 years now, and a lot of time 
being a technical employee at an Apple Authorized Service Provider, i 
forgot about this detail in the 4400 -- i guess i *wanted* to forget it 
;)

anyway, here you got the correct information:

http://docs.info.apple.com/article.html?artnum=112401

it is 4,5V Alkaline.

regards,

timo