UNIWILL 223-3S4000-S1P1 4400mAh/49Wh 6 Cell Li-ion 10.8V Black Compatible Battery Compatible Battery with 1 year warranty Battery built by highest quality materials including grade-A brand-new cells Battery meets and exceeds OEM specifications and lasts longer hours Battery offered in this listing is CE & RoHS certified, so you can shop with a peace of mind.