HWG Laptop Replacement Battery (BTY-M6D) For MSI GT60 GT70 GX60 GT660(R) GT780 etc. Series Battery type: Li-ion; Capacity: 7800mAh; Cells: 9-cell; Voltage: 11.1V. 100% NEW from manufacturer; Up to 500 recharge cycles over the life of the battery. 24 x 7 email support; 30-days hassle-free warranty. Every battery has passed factory testing; Durable grade A cells battery; Quality assurance. Fulfilled by Amazon.