This is a brand new HP ProBook 4320s 4321s 4325s 4326s 4420s 4421s 4425s 4520s 4525s replacement battery. There are two key components inside your battery pack to look for when buying a new computer battery. The quality of the battery’s 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 (milliamp 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. There are no compatibility issues if your existing battery is rated at 4400 or 4800 mAh or a lower Whr. Simply put, more is better. And yes, this battery is probably better than your original!


All our products carry a full 2 Year warranty and every battery is charged and tested before it ships.
We provide a 30-day money back guarantee if you are not completely satisfied. We are so confident in the quality of our batteries, we will pay for any and all shipping expenses if our product fails to perform in the first 30 days you have our battery, even if it is not our fault. (PS- if your laptop will not turn on at all when plugged –in, you need a new ac power adapter found at the bottom of this page) Feel free to call for tech support.

Check your current battery to ensure you are ordering the correct battery. It should match the picture above. This battery will provide about 2 hours to 2.5 hours of run time with this computer battery when new, depending on your energy use.

If you want even longer run time, check out our 9 cell battery which provides an extra 1- 2 hours of run time for a total of about 3-4 hours of battery runtime. { Click here for the 9 cell HP ProBook extended run battery}

This battery replaces the Hewlett Packard ProBook 4320s, 4321s, 4325s, 4326s, 4420s, 4421s, 4425s 4520s, 4525s, and Compaq 320, 321, 325, 420, 425, 525, 620, 621, 625 series laptop batteries and a host more which are listed at the extreme bottom of this web page.

Laptop Battery Express only deals with brand new premium computer batteries. We never carry recycled or used batteries. We only use the highest quality cells inside the battery pack so you will have a long service life (300-500 recharge cycles). We do not use cheaper battery cells which can wear out in a little as 3 to 6 months. Our inventory turns rapidly and you will always receive a freshly manufactured battery.