How to Get Long Life Out of Laptop and Cell Phone Batteries
Tech Soup
JUNE 20, 2011
Dell says that a full life span for a garden-variety lithium-ion laptop battery is 18 to 24 months. That's a technique in which you let the battery run down or discharge to below 20% and then fully recharge it without interruption. Lithium-ion batteries are actually pretty benign environmentally.
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