Re:HP made a laptop slightly thicker to add 3 hours of batte...
by rch on Tuesday January 03, 2017 @09:48PM
(#13315277)
My Sharp MM10 had swappable batteries: one was thin (total 0.54 inches for the laptop), and another would protrude out the back, but provided 8 hours of work. Not bad for 2003.
https://www.wired.com/2008/01/sharp-actius-mm/