Specifications: Battery type: Li-ion. Color: Black. Voltage: 10.8V. Capacity: 72Wh/6600mAh/6-Cell/61++(Much Higher Capacity than 24Wh/48Wh). ZTHY specialized in Laptop Accessories including Laptop Batteries and Adapters Replace Part Number: 61 61+ 61++ 01AV422 01AV423 01AV424 01AV425 01AV426 01AV427 01AV428 01AV452 01AV490 01AV491 01AV492 02DL023 SB10K97579 SB10K97580 SB10K97581 SB10K97582 SB10K97583 SB10K97584 SB10K97585 SB10K97597 SB10K97661 4X50M08810 4X50M08811 4X50M08812