FOCUSTEC 6-Cell 11.1V Li-ion Battery for Dell Latitude E5420 E5430 E5520 E5530 E6420 E6430 E6520 E6530

6-Cell 11.1V Li-ion Battery for Dell Latitude

This 6-cell lithium-ion replacement battery delivers 11.1 volts for compatible Dell Latitude E-series laptops including the E5420, E5430, E5520, E5530, E6420, E6430, E6520 and E6530 models. It suits professionals and students who need reliable mobile power for daily office tasks and light productivity work. The black casing matches the original aesthetic and installs without tools. It is not for users requiring extended runtime beyond the standard 6-cell capacity or those with incompatible Latitude models.

Capacity and Runtime Headroom

The 6-cell configuration provides standard capacity for typical business use such as document editing, web browsing and video conferencing. Rated for up to 500 recharge cycles over its service life, it maintains usable runtime through repeated daily charging. Runtime diminishes gradually as cycles accumulate and heavy workloads like sustained video rendering or maximum screen brightness will deplete the charge faster. It does not satisfy users who need all-day operation without access to a power outlet.

Replaces Dell T54FJ and Listed Part Numbers

This unit replaces the original Dell T54FJ battery and matches part numbers 312-1163, 312-1242, M5Y0X, HCJWT, KJ321, NHXVW, PRRRF, T54F3, X57F1 and 7FJ92. The upgrade is worthwhile when the original battery holds little charge, fails to charge fully or triggers replacement warnings in the BIOS. CE, FCC and RoHS certifications confirm compliance with safety standards including over-voltage, short-circuit and over-current protection. It does not fit Latitude models outside the listed E-series range or systems requiring a different voltage or cell count.