On 2/13/03 [EMAIL PROTECTED] (Alan O'Neil) wrote:
>
>I have a couple of PowerBook 500 laptops here, and I don't have any
>batteries for them. According to the service manual, the batteries are
>supposed to output 10.8 volts. If my math is right, that means exactly nine
>1.2 volt rechargeable AAs.
>
>Would it be feasible to fabricate a battery holder case to fit the slot on
>the PowerBook and then fill it with high-capacity NiMH batteries? I'm not
>convinced that nine batteries can even fit in that slot. Any help here? Oh,
>and I hear that the batteries are the "intelligent" kind-- would that post
>a problem when replacing with "dumb" battery rebuild packs?

Alan, you'll need the electronics in an Apple battery, I seriously doubt 
the 'Book will charge a dumb pack. However, I reckon the 'Book might run 
on a pack if you can use some sort of external charger. That doesn't seem 
worth the trouble.

However, the _8_ cells you need to rebuild an Apple battery can be 
purchased as a 9.6v NiMH pack sold for RC hobbiests. I bought a 2100mah 
set at the Rat Shack for ~$25, works fine and is actually a little 
lighter than the original. BTW, they do put out around 10.5v to 11v when 
fully charged.

hth,

Dan K

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