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Rectangular black lithium-ion laptop battery pack

KingSener

KingSener BTY-M57 laptop battery 15.2V 4280mAh 65WH for MSI GP66 GP76 Leopard 10UG

SKU CH-G397-S58MK MPN BTY-M57

Replacement lithium-ion battery rated 15.2V, 4280mAh and 65WH for MSI GP66 and GP76 Leopard 10UG laptops

  • Battery voltage rating15.2 V
  • Battery capacity4,280 mAh/65WH
  • 2 V 4280 mAh 65 Wh capacity powers demanding workloads
  • Li-ion chemistry delivers reliable energy density for daily use
  • Direct replacement for BTY-M57 part number fits without modification
  • Compatible with MSI GP66 and GP76 Leopard 10UG series
  • Brand-new condition ensures full rated performance from first charge

Replacement battery for MSI GP66

This KingSener BTY-M57 unit is a direct replacement battery built for the MSI GP66 Leopard 10UG and GP76 Leopard 10UG series. It fits the MS-17K3 chassis and restores mobile power to those specific notebooks. Buyers needing a different voltage or form factor will not be served by this model.

Li-ion chemistry at 15.2 V and 65 Wh

The pack uses lithium-ion cells rated at 15.2 volts and 65 watt-hours, matching the original specification for the compatible machines. No cables, tools or software are bundled; the battery itself is the only item supplied. Installers must reuse existing fixings and connectors from the old pack.

4280 mAh capacity for standard workloads

At 4280 mAh the cell delivers typical runtime for everyday tasks on the supported GP66 and GP76 models. Heavy gaming or sustained high-wattage loads will drain the charge more quickly, requiring mains power for extended sessions. Users expecting all-day autonomy under full load should plan for external power.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $39.99
Pricier than about 71% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameKingSener
Model nameBTY-M57
Part numberBTY-M57
Power
Battery voltage rating15.2 V
Battery capacity4,280 mAh/65WH

Questions about this item

How long will the 4280mAh Li-ion cells hold a useful charge before I need a replacement?

The 65WH Li-ion pack is rated for hundreds of full cycles; expect several years of daily use before capacity drops enough to warrant a new BTY-M57.

What stops the 15.2V 65WH pack from running longer during an all-day gaming session on the GP66 or GP76?

The 65WH capacity is the hard limit; once the 4280mAh cells deplete, the laptop must be plugged in regardless of workload intensity.

Does the BTY-M57 get hot or make noise when the MSI GP66 or GP76 runs flat-out all day?

The battery itself is silent and produces only normal warmth during discharge; any fan noise or heat comes from the laptop's own cooling system.

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