TAUPO New Replacement Laptop Battery for HP ProBook 4321s 4320s 4325s 4520 4520s 4525s 4420s 4425s 4326s 4320T 4421S Compaq 320 321 325 326 420 421 620 621 PH06 PH09 [4400mAh/49Wh, 11.1V] (Electronics)

This is a really nice laptop battery. It fits in HP. It does work it needed to be charged when it came in. It is a really nice battery. It fits my hp perfectly. If you are looking for a replacement battery for your computer then look no further give this one a try.
I got this product deeply discounted, I was in no way compensated for my honest opinion.