How to Get Long Life Out of Laptop and Cell Phone Batteries
Tech Soup Blog
JUNE 20, 2011
Dell says that a full life span for a garden-variety lithium-ion laptop battery is 18 to 24 months. In order to keep rechargeable batteries healthy, the refurbishers that I've spoken to about this tend to agree that with lithium-ion rechargeable batteries that power most laptops, mobile phones and tablet computers, it's not good to let the battery go below 10% of its charge. Lithium-ion batteries are actually pretty benign environmentally.