Laptop external power from batteries (DC/DC)

[michael miller]

That would be 3 Li cells in series.  My Dell Inspiron 5150 has a battery
labeled 14.8v, 6450mAh with a charger specified as 19.5v 6.7A. It's a
pain in the butt and next time I'm looking at a new laptop I will check
the battery voltage before buying. I think that 11.1v is a more common
battery for laptops based on the availability of inexpensive 12v
chargers for other laptops but not the Dell 5150 at least.  I use 7.2
and 11.1v Li batteries in a variety of other applications and they are
easy to charge off of car batteries or replace with a regulated supply
running off of 12v.

Mike Miller
On Thu, 2008-08-21 at 10:02 -0400, Ben Scott wrote:
> On Thu, Aug 21, 2008 at 9:52 AM, michael miller <k4ghp at comcast.net> wrote:
> > The internal battery nominal voltage is 14.4 (4 x 3.6v cells in series).
> 
>   FYI and FWIW, two Dell laptops I just checked indicate 11.1 volts on
> the battery label.
> 
> -- Ben
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-- 
michael miller <k4ghp at comcast.net>