On Tuesday, November 19, 2002, at 01:28  PM, David M. Ensteness wrote:

>> Another consideration is the backup power.  With 512MB, the Pismo has
>> enough backup battery to allow you to swap batteries with the machine
>> asleep.  With 1Gb, it apparently doesn't; you have to shut down or 
>> have
>> AC support.  I don't know about 768MB.
>
> This part I don't get. Can you explain? Powering the RAM does not take
> much energy. The RAM amount should not affect this at all.

When you put your Pismo to sleep and remove the main battery, the 
Backup Battery (a rather small lithium (?) battery) maintains your RAM 
contents. It is a fairly week battery, though, and can't maintain the 
contents of much RAM; 512MB is about the most it can preserve. Even 
with 512MB, it can only preserve the RAM for a few moments. Any more 
than about 512MB and you need AC Power or a Battery in the other bay.


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