Why are Inland replacement laptop batteries better? CAPACITY - Inland batteries use the same capacity battery cells as your original battery or better! Other vendors cut corners with lower capacity cells. QUALITY - Inland batteries use cells manufactured exclusively by the trusted brands Samsung, LG, and Sanyo. Other vendors use unbranded cells manufactured in China. SAFETY - Inland batteries are manufactured with a USA-made, Texas Instruments control chip. You are safer using an Inland replacement battery than one made with a control chip from an unknown source. LONGEVITY - The name-brand cells will last for double the length or better than knock-offs, exceeding 1000 charge cycles (compare to less than 500). WARRANTY - Inland batteries come with an unprecedented two-year warranty! We can offer this because our quality is far superior to the alternatives. Replacement laptop battery for HP laptops & notebooks, models include various ProBook units such as ProBook 4330s, ProBook 4331s, ProBook 4430s, ProBook 4431s, ProBook 4435s, ProBook 4436s, ProBook 4440s, ProBook 4441s, ProBook 4446s, ProBook 4530s, ProBook 4535s, ProBook 4540s, ProBook 4545s. This 4400 mAh Lithium-Ion battery is rated at 10.8V*, yielding 47.5 Wh of power. The longevity rating is 1000 cycles and it comes with a 2 year warranty. Micro Center offers HP laptop battery replacement and installation services to ensure your laptop will be back up and running quickly - ask the store for details. This is a replacement for HP part numbers including PR06, 633805-001, 650938-001, 633733-321, HSTNN-IB2R, HSTNN-DB2R. See the specs tab for detailed HP laptop compatibility. *Also compatible with 11.1V and 10.95V applications.