KingSener L17L6P71 laptop battery 11.4V 48WH for Lenovo ThinkPad X280

Compatible replacement for ThinkPad X280

The KingSener L17L6P71 is a new lithium-ion battery built to match the original specifications for the Lenovo ThinkPad X280. It delivers 11.4V and 48WH capacity using 4.19Ah cells. The part replaces OEM numbers L17C6P71, L17M6P71, 01AV470, 01AV471, 01AV472 and SB10K97617. Buyers needing a different voltage or a higher watt-hour rating will not be served by this unit.

Fixed voltage and capacity ceiling

The battery operates at a single 11.4V output with a hard limit of 48WH energy storage. Runtime scales directly with the 4.19Ah cell rating and cannot be expanded. The pack uses a proprietary connector keyed to the X280 chassis, so it cannot power other laptop models or external devices. Users expecting fast-charge protocols or user-swappable cell modules will find none here.

Straightforward internal swap with break-in steps

Installation requires opening the X280 base cover, disconnecting the old pack and fitting the new one in the same footprint — no adapter cables or firmware flashes. The supplier recommends two to three full charge and discharge cycles at low current to calibrate the gauge. Leaving the AC adapter connected continuously, storing above 80% charge for long periods, or exposing the pack to heat and humidity are the common mistakes that shorten cell life.