TWB Premium Grade Generic Laptop Battery For HP 510, 530 HSTNN-FB40 TWB Batteries are the perfect choice that you can make for your computer. Very affordable, The best quality batteries on the market. Long Life durable Battery for your Laptop Specifications: Voltage: 14.4V Capacity: 4400mAh Compatible Battery Models: 443063-001 440264-ABC 440704-001 440266-ABC RW557AA 440268-ABC 441674-001 HSTNN-FB40 440265-ABC HSTNN-IB45 HSTNN-IB44 HSTNN-C29C Compatible Laptop Models: HP 510 HP 530 Package Included: 1 x Laptop Battery What's in the box 1 X Laptop Battery