Is your old HP ProBook battery dying after an hour? This is a high-capacity 9-cell replacement battery that should give you way more juice. It's got a hefty 7800mAh capacity and runs at 11.1V. It's compatible with a ton of ProBook models: 6360b, 6460b, 6465b, 6470b, 6475b, 6560b, 6565b, 6570b, and even some EliteBooks like the 8460p. It's an unbranded/generic battery (not an official HP part), but it's new and comes in its packaging. Just swap out your old, puffy battery for this one – it should click right in. Always a good idea to fully charge it first. A standard warning: like all batteries, it contains chemicals (California Prop 65 warning). But for the price, it's a solid way to resurrect an older ProBook and get it off the charger for a full workday again.