Xtend Battery for HP ProBook 4320s 4321s 4325s 4326s 4420s 4421s 4425s 4520s 4525s 4720s Laptop Battery

Hewlett Packard ProBook battery for 4320s, 4321s, 4325s, 4326s, 4420s, 4421s, 4425s, 4520s, 4525s, 4720s and Compaq 320, 321, 325, 420, 425, 525, 620, 621, 625 This is a brand new HP ProBook 4320s 4321s 4325s 4326s 4420s 4421s 4425s 4520s 4525s 4720s replacement battery. There are two key components inside your battery pack to look for when buying a new computer battery. The quality of the batterys lithium-ion cells and the quality of the computer chip set in the battery pack. This battery is built with the best components, not the cheapest.This battery contains the very best Li-ion cells on the market from Samsung. An important specification to look for with rechargeable batteries is the mAh (mili amp hour) rating or Whr (Watt Hour). This battery is rated at 5200 mAh or 58 Whr. This is the highest rating available for a 6 cell battery pack. The higher the mAh rating, the longer your battery will run before it needs to be recharged again. Please note, this is not compatible with 15.6 inch models.