Dr. Battery MPL03238P-04 6-cell 10.8V 4400mAh laptop battery

Direct replacement for listed Asus models

This Dr. Battery MPL03238P-04 is a new six-cell lithium-ion unit built to match the original A32-K55, A32-K55X, A33-K55 and A41-K55 part numbers. It fits Asus F45A, F75A, F75VD, K45, K55, K55A, K55N, K55VD, K75, P45VJ, R400, R500, R700, U57, X45, X75, X75A, X75V, X75VC and X75VD notebooks. The black casing and 10.8 V output mirror the factory specification. Buyers who need a different voltage or a higher cell count cannot use this pack.

Steady discharge with integrated protections

The built-in smart control chip manages charge cycles to reduce power draw and extend discharge time during continuous use. Overheat, short-circuit and overload safeguards activate automatically when the pack approaches its thermal or current limits. Capacity holds at 4400 mAh across the full voltage range, so runtime remains predictable from start to finish. Systems that require proprietary fuel-gauge communication beyond the standard SMBus interface may not report remaining capacity accurately.

Limited by 10.8 V lithium-ion chemistry

The 48 Wh energy ceiling is fixed by the six-cell 10.8 V architecture, so the pack cannot deliver more runtime than the original design allows. Recharge speed is governed by the laptop’s own charging circuit and the cell chemistry’s safe current acceptance. Users who need longer unplugged sessions must carry a second pack or use an external power source. The one-year manufacturer warranty covers defects but does not extend the cycle-life limits of lithium-ion technology.