BATTERY SPECIFICATION: Battery Type: Lithium-ion Battery Voltage: 12 Volt Battery Capacity: 3700mAh (44.4Wh) Package Include: 2 x Battery + 1 x Charger COMPATIBILITY Replace for 12V Battery: 48-11-2450, 48-11-2425, 48-11-2440, 48-11-2402, 48-11-2412, 48-11-2420, 48-11-2401, etc Our Batteries and Charger Set Compatible with 12V Series 150+ Cordless Power Tools OUR BATTERY ADVANTAGES: 1. Adopting A+ high capacity Cells, which features low iner resistance and can be used for 1000+ Cycles( inferior cells can only use 600 cycles? 2. 3700mAh High-capacity provides much longer run time within a full charge, make your tools more powerful. 3. Both battery and charger are CE, FCC and RoHS certified. All products undergo inspection before sale to ensure that the batteries and chargers you receive are in good condition. 4. We provide you new battery if the battery you received cannot be charged within 1 year.