[Specifications] Voltage: 14.8V Capacity: 40WH/2600mAh ; Cells: 4-cell; Color: Black, Condition:New, Battery life: More than 1000 cycles, Packages includes: 1x M5Y1K battery,1x Instruction for dell laptop battery m5y1k Battery length: 10.83 x 1.38 x 0.79 inches Weight: 8.8 ounces,made of the highest-quality The internal PCB board of the M5Y1K battery has been upgraded to ensure 100% compatibility with the original dell 40wh m5y1k 14.8v battery. It is compatible with computers of any year, without any limitations on the computer's model year [Compatible Models] Compatible with Dell Inspiron 14-3451 14-3452 15-5551 15-5552 15-5555 15-5558 15-5559 15-5758 17-5755 17-5756 17-5758 17-5759 14-3458 14-3459 14-3462 14-3467 14-5451 14-5452 14-5458 14-5459 14-5455 14-5459 15-3551 15-3552 15-3558 15-3559 15-3565 15-3567 laptop Notebook battery, Compatible with Dell 40Wh Standard Rechargeable Li-ion Battery Type M5Y1K 14.8V