Has anyone checked what the Maximum Voltage charge is for the Toshiba
PA2490U (using older Toshiba LapTops)?

Reason am asking is I recently read "How to Prolong Lithium-based
Batteries" http://batteryuniversity.com/learn/a...ased_batteries
which mentions "Specifying battery life by the number of discharge
cycles is not complete by itself; equally if not more important are
temperature conditions and charging voltages. Lithium-ion suffers
stress when exposed to heat and kept at a high charge voltage....The
voltage level to which the cells are charged also plays a role in
extending longevity...Realizing the stress on the battery, some laptop
and cellular phone manufacturers choose an end-of-charge voltage that
is less than 4.20V/cell."

Am wondering how conservative Toshiba decided to be?

Thanks

Ken