iRulu Brand 11200mAh 7.4V 8 Cells Laptop Battery for HP Pavilion tx1000 tx1100 tx1200 tx1300 tx1400 tx2000 tx2100 tx2500 tx2600 Series, TouchSmart tx2 Series. Compatible with 431325-321, 441131-001, HSTNN-OB37, HSTNN-OB38, HSTNN-UB37, HSTNN-XB37, HSTNN-XB41, HSTNN-XB76, RQ203AA, RQ204AA (High Capacity with Original Samsung 2800mah cells---much longer lasting time) Offer you the most high quality and high capacity batteries with Original SAMSUNG 2800mah cells, much safer, no explosion, no combustion, no toxic, no pollution. iRulu Brand New Laptop Battery for HP Pavilion tx1000 tx1100 tx2600 Series, TouchSmart tx2 Series (Pls study the product desription below to make sure your original battery and laptop meet the compatibility of both the part # and models) Shipping from OHIO, USA, 2 to 5 days delivery guarantee. High capacity battery certified by CE and RoHS. 100% OEM compatible! Warranty: 30-day money back & 1-year guarantee!