EC TECHNOLOGY New Laptop Extended Replacement Li-ion Battery, 9 Cell 6600mAh, For Dell Inspiron 1525 1526 1545 PP29L PP41L Series, 1525 1526 1545 PP29L PP41L, Fits 312-0844 312-0625 I15-157B 312-0626 K450N GP952 RU586- 12-Month Warranty Battery type: Li-ion; Cells: 9-cell; Capacity: 6600mAh; Voltage: 11.1V. Built with premium materials and undergoing strict QC process, circuit protection ensures both safety and stability. Grade A cells ensure fast charges and low power consumption, Up to 500 recharge cycles over the life of the battery.. Operation time for standard batteries(9-cell, 6600mah): 2-3 hours; for extended batteries(12-cell, 8800mah): over 4 hours (Note: The actual operation time will depend on how much electricity is required by the device and how do you use it.) CE-/ FCC-/ RoHS-Certified for safety, 12-month hassle-free warranty.