Battery Type: 3-Cell Li Polymer Best OEM Quality Voltage:11.55V , Capacity: 41.9Wh 3630mAh Safeguard features against incorrect voltage, short circuit, internal overheating 100% Brand new ,Grade A cells battery; Quality assurance;every battery has passed factory testing; 500+ recharge cycles over 1 year warranty;full refund in 30days;Friendly Customer Service