Dr. Battery MPL05261P-27 6-cell 11.1V 4400mAh 49Wh laptop battery

Replacement battery for Dell XPS 14 15 17 series

This 6-cell lithium-ion unit replaces the original Dell batteries listed under part numbers such as 0J70W7, 0JWPHF and 312-1123. It fits XPS 14, 15 and 17 models including the L501x, L502x, L701x and L702x families. The pack delivers 11.1 volts and 4400 milliampere-hours for 49 watt-hours of capacity. It is aimed at owners of those Dell notebooks who need a fresh power source.

Upgrade from a worn or failed original pack

When the factory battery no longer holds a useful charge or shows swelling, this new cell restores the laptop’s rated runtime. The jump is worth it if the machine otherwise meets your needs and you want to avoid a full system replacement. It is not for users whose chassis or motherboard has been damaged, nor for those who need a higher-capacity design than the original 49 Wh specification.

Limits of the 11.1 V 6-cell lithium-ion format

The chemistry and voltage are fixed by the original Dell design, so the pack cannot exceed the 49 Wh capacity without physical changes. Run-time will vary with workload, screen brightness and battery age. The built-in protection circuit guards against short circuit, overheat and overload, but it does not alter the fundamental energy ceiling of the 6-cell layout.