On Fri, 9 Dec 2016 11:24:19 +0000
john west wrote:

There's a lot of information about that if you keep a Laptop battery
charged between only 80% full and only 40% full, it will be
servicable over the years for four times as long.

Other information I find says it is the charging and discharging that
wears the battery out.

The laptop i have (with a built in battery) is mainly used in one
room, so it is easy to keep it plugged in *all the time* to mains
electricity.

Would it be better to prolong the life of the battery to keep it
plugged in all the time or to go for the 80% - 40% option. Thanks.

I asked a similar question a couple of years ago, in a computer
newsgroup, and there was little consensus about the best method of
conserving the battery. It will be interesting to see if there is
anything new.
I bought this laptop new about four years ago, and used it with the
battery installed, but using the mains, and the battery power is almost
zero now, so I am looking for the best way to treat a replacement
battery.

--
Davey.