TLC&reg;Brand New Replacement Laptop Battery for Dell Latitude D420, D430 10.8V/4400mAh - 12 Months Warranty Battery type: Li-ion; Capacity: 3800mAh/42Wh; Cells: 6-cell; Voltage: 10.8V 100% TLC Brand new from manufacturer. Under 100% Aging Test. Up to 500 cycles life, low self-discharge, no memory effect; Dual IC chips provide protection against short circuit, over-discharge, overcurrent. CE/FCC/RoHS certified for product safety. 24/7 email support, 12-month hassle-free warranty. Grade A Cell ensures fast charging and low power consumption; Built-in circuit protection ensures both safety and stability. Operation time for standard batteries(6-Cell, 3600mAh): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it.