It seems that I have been following the wrong advice about laptop (or cellphone) battery preservation.
It’s better for them to be repeatedly slightly discharged and then recharged.
I tend to a) drain the battery completely before doing a recharge and b) run my laptop plugged in, whenever a power socket is available.
Today’s invention is therefore a timer which can be attached to a laptop (or phone) power cord which can be plugged into a machine all the time it’s available but which only passes current after a 10% discharge has occurred.
So another IOTD made real…
http://uk.lifehacker.com/5794824/the-belkin-conserve-socket-automatically-shuts-off-charging-devices-with-the-flip-of-a-switch