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From: prestonb@hpcvra.CV.HP.COM (Preston Brown)
Newsgroups: comp.sys.handhelds
Subject: Re: HP48 Mem X cards.
Message-ID: <25590003@hpcvra.CV.HP.COM>
Date: 30 May 90 00:07:07 GMT
References: <4834@plains.UUCP>
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 26

>Does that 0 to 50C range apply to the HP48 also?
 0 - 45C for the HP48

>What happens if you go below 0. In some of the places I use the calculator,
>that's a very real possibility.
 There is a very small chance you may lose memory.  Storage temp is speced
down to -20 deg C

>What's needed to replace the battery on a card?
  A new battery; follow the procedure in you users manual.  Basically
if you don't want to lose memory you must have the card installed and
the calculator turned ON while changing a memory card battery.

>Is there a convenient way for ME to test the battery? 
Just plug it in to you calculator and turn in on.  If the battery is 
low the calc will display a warning each time it is turned on.  The
low battery warning will start a few months before the battery completely
dies.

>My calculator will see
>45 to 50C often, so I may have a problem with battery life?
You may see reduced battery life if the card is left at high temperatures
for extended periods ( 50C for 1 year may deplete you battery completely while
at room temperature it may last 5 years or longer.)

Preston