Dr. Battery M660NBAT-6 laptop battery 10.8V 4400 mAh

Dr. Battery M660NBAT-6 replacement battery

The Dr. Battery M660NBAT-6 is a new 10.8V 4400 mAh Li-ion laptop battery built with OEM-grade cells. It serves as a direct replacement for a long list of original part numbers including BTY-M66, CBPIL44, SQU-524 and M660BAT-6. The unit fits LG F1 Express Dual, MSI EX, GX and Megabook series, Clevo M and W series, BenQ JoyBook R55, Medion Akoya and Advent models. Professional Series construction targets stable daily power for older notebooks.

Sustained-load behaviour and safety

Integrated protection circuits guard against over-charge, over-discharge, overheating and short-circuit during extended use. Li-ion chemistry and cell grading aim to keep voltage delivery steady across a full discharge cycle rather than only in short bursts. The 4400 mAh capacity supports typical office workloads through long sessions without sudden voltage sag. OEM-grade assembly reduces the risk of premature capacity fade under repeated thermal cycling.

Upgrade context and fitment check

This battery replaces worn or failed original packs in the compatible LG, MSI, Clevo, BenQ, Medion and Advent chassis listed. The jump is worth it when the original pack no longer holds a useful charge or shows swelling. Buyers who need a different voltage, a higher capacity than 4400 mAh, or a form factor for models outside the listed series must select another part. Always verify the original part number and 10.8V rating before ordering.