[Ti] clock reset without battery?

[Kynan Shook]

There is an internal backup battery.  It is not easily replaceable, 
because it generally doesn't need to be replaced.  It is rechargeable, 
so to recharge it, plug the computer in for 24 continuous hours.  After 
this, you can test the battery by shutting down, removing the battery 
and AC for 10 minutes, plugging back in, and checking the date.  There 
are many things that will reset the date that do not mean that you need 
a new battery; pressing the PMU Reset button on the back/under the 
keyboard/with the appropriate keyboard command, possibly by removing 
the battery while running, keeping the computer with no battery and no 
AC for too long, etc. etc. etc.

Also, not all Apple portables have backup batteries.  Specifically, all 
iBooks and the 12" PowerBook use supercapacitors instead.  It is 
because of this that you cannot swap batteries while those models are 
asleep and unplugged - the computer will lose power during this 
process.  The 15" and 17" PowerBooks have backup batteries, which 
should pretty much always outlast the machine itself.


Lisbeth Zachs <zachs at swedenmail.com> writes:
> 2004-06-29 kl. 23.18 skrev Justin R.Miller:
>>  Clock being set to 12/31/69 7:00pm.
>> I would think that there is an internal BIOS battery that would keep
>> this going -- am I mistaken?
> -----------
> Mistaken or not, when I have had my battery accidently disconnect 
> while=20=
> unplugged I have to reset the clock every time. But mine is set to 
> may=20=
> or something 1970 or possible 1971. It is rather funny that we don't=20
> seem to have the same basic date for all Tibooks since it obviously 
> not=20=
> the date of production anyway. :-)
>
> I have taken my Tibook apart and found no obvious place fpr a=20
> replaceable BIOS battery if it exists. I don't think it does acctually.