Dell Latitude E6420 E6430 Battery T54FJ 8858X M5Y0X E5420 E5430

Replacement lithium-ion laptop battery compatible with Dell Latitude E6420, E6430, E5420, and E5430 series matching part numbers T54FJ, 8858X, and M5Y0X. Built with quality power cells to deliver steady electrical output, reliable daily runtime, and dependable thermal stability for office tasks and media playback. Precision-molded physical housing ensures exact drop-in fit matching original battery compartment geometry, latch alignment, and mainboard power pin placement. Integrated circuit protection safeguards against overcharging, overcurrent, and thermal anomalies during regular operation. Power down the notebook completely, disconnect external power and peripheral devices, secure the replacement battery firmly into the bay, engage the latches, and charge to full capacity prior to initial untethered mobile use.