Battery capacity - Compaq vs HP

Archived from groups: comp.sys.laptops (More info?)

I would presume that the batteries are absolutely not interchangeable
and that an attempt to do so could well damage the laptop and the battery.


nospamlah-googlenews@yahoo.com wrote:

> Can someone pls explain whether the battery from these notebooks are
> interchangeable?
>
> My Compaq Presario V1000 comes with a battery with these rating : 10.8V
> 4.4AHr. It has enough juice for about 2.5hours of office usage (word
> processing mostly).
>
> My colleague has a HP laptop which looks almost the same as mine (the
> placement of all the ports, speakers, etc etc are identical; only some
> buttons are round instead of rectangular). I think both are based on
> the same design. Anyway this laptop comes with a diferent battery pack
> with rating of 18V (and around 4AHr IIRC). My colleague said he can get
> more than 3hours usage from each charge.
>
> Both machine came with identical charger (DC output is 18.5V/3.5A).
>
> a) Is the 18V rating on the HP pack for real or a typo?
> b) Is it normal to have such high voltage for a laptop?
> c) If I plug the HP battery into the Compaq, will it fry the Compaq?
> d) Is it fair to assume that the Compaq does have some form of
> over-voltage protection?
>
> TIA.
>