In a message dated 7/12/03 4:23:24 PM, [EMAIL PROTECTED] writes:

<<
They look just like 3.6V batteries used in Macs.  Are they the same, or at 
least close enough?
>>

They're probably alkaline.

The "3.6" volt batteries used in Macs are actually about 3.68 volts out of 
the circuit when brand-new, and about 3.64 volts when in the circuit. These are 
1/2-AA Lithium nonrechargeables.

The performance is good until the voltage reaches about 3.2 volts, after 
which performance can be pretty flaky when the voltage drops below 3.0 volts.

I believe the original Mac batteries were 3.0 volts, and those were barely 
adequate for the old clock chip.

Some PowerBooks employed two 3.0 volt Lithium rechargerables stacked into a 
dual 3.0 volt and 6.0 volt battery.

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