Saturday, November 04, 2006

LiON batteries: don't leave them fully charged

A SciAm review of LiON batteries mentions that leaving them fully charged shortens their lifespan:
... batteries degrade, but lithium-ion cells erode faster when highly charged and warm; an average notebook battery kept at full charge at 25 degrees Celsius will irreversibly lose about 20 percent of its capacity a year...
So it's better to let them cycle completely before recharging. Leaving the device continuously plugged in (like our Nano) will shorten its lifespan.

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