High Performance 5200mAh 14.4V 8 Cell Laptop Battery for HP ProBook 4510s ProBook 4510s/CT ProBook 4515s ProBook 4515s/CT ProBook 4710s ProBook 4710s/CT series; fits 513130-321 535808-001 591998-141 593576-001 HSTNN-1B1D HSTNN-OB89 HSTNN-W79C-7 HSTNN-XB89 NBP8A157B1 NZ375AA Extended laptop battery for HP ProBook 4510s ProBook 4510s/CT. Pls study the product desription below to make sure your original battery and laptop meet the compatibility of both the part # and models We are direct from manufacturer and all batteries are made of A grade cells. Shipping from OHIO, USA, 2 to 6 days delivery guarantee. High capacity battery certified by CE and RoHS. 100% OEM compatible! Warranty: 30-day money back & 1-year guarantee!