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Welcome to OUWEE OUWEE are mainly sold adapter, laptop battery, power bank , etc. Before placing your order, we highly suggest you to open the back case of your latptop and check out the exact part number of your laptop's original battery. 1.Battery Type: Rechargeable Li-ion Battery 2.Model: 9NJM1 3.Voltage: 11.4V 4.Capatity: 99Wh 8820mAh 5.Connector: Please refer to the picture and check it. 6.Certificate: CE,RoHS,FCC,100% New from Manufacturer, Grade A Cell 7.Worry-Free Warranty: At OUWEE, we believe in our battery. That's why we back them all with an 12-month warranty and provide friendly customer service, easy-to-reach support. 8.Replacement for Part Number: 9NJM1 0546FF 0HF250 44T2R HF250 MG2YH 0MG2YH 9.Compatible Models (use "Ctrl+F to find your model quickly") Dell Alienware 15 R3 17 R4 Series Notebook. 10.Package included: 1X 9NJM1 Battery. 11.For Optimal Use battery: ①Discharge the new battery to 5% (not 0%), then charge and cycle 3-4 times to wake up the new battery. ②The important point is to perform a full discharge charge every other month to extend battery life. ③Don't connect adapter for a long time while using the battery. It may damage the battery. ④Avoid artificial shocks, disassembly, crush or puncture. Do not dispose of in fire or water. ⑤Avoid using the battery in an environment where the temperature is too high or too low.