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Black 9-cell lithium-ion laptop battery pack rectangular shape

KingSener

KingSener BTY-L77 laptop battery 11.1V 7500mAh 83.25Wh 9-cell

SKU CH-WA16-3290W MPN BTY-L77

9-cell 11.1V 7500mAh Li-ion replacement battery for MSI GT72, GT72S and GT72VR series notebooks

  • Battery Voltage11.1V
  • Battery Capacity7500mAh/83.25WH
  • 1 V Li-ion chemistry delivers 83.25 Wh of reliable power
  • 7500 mAh capacity keeps the notebook running longer per charge
  • Nine-cell design fits MSI GT72, GT72S and GT72VR chassis
  • Direct replacement for part numbers BTY-L77 and 1781-33/2500 S
  • Brand-new unit supplied with a one-year guarantee

Replacement battery for MSI GT72 series

This KingSener BTY-L77 is a new lithium-ion replacement battery built for MSI GT72, GT72S and GT72VR notebooks. It delivers 11.1V and 7500mAh capacity for 83.25Wh of energy across nine cells. The pack replaces part number BTY-L77 P/N:1781-33/2500 S and fits chassis codes MS-1781, MS-1782 and MS-1783.

For owners of listed MSI models only

This unit suits owners of the specific MSI GT72 variants named in the compatibility list, including 2PE-022CN, 2QD-005XCN, 2QD-1019XCN, 2QD-292XCN, 2QE-1679CN, 2QE-1813CN, 2QE-209CN and 2QE-212CN. Buyers with other MSI series or different manufacturers should look elsewhere because the connector and form factor match only the models above.

9-cell 83.25Wh capacity defines runtime

The single specification that decides fit is the 9-cell 83.25Wh rating at 11.1V. A lower cell count or different watt-hour value will not match the original mechanical and electrical design of the GT72 series. Verify the part number on your old battery before ordering.

Highlights

  • 1 V Li-ion chemistry delivers 83.25 Wh of reliable power
  • 7500 mAh capacity keeps the notebook running longer per charge
  • Nine-cell design fits MSI GT72, GT72S and GT72VR chassis
  • Direct replacement for part numbers BTY-L77 and 1781-33/2500 S
  • Brand-new unit supplied with a one-year guarantee

Specifications

BrandKingSener
ModelBTY-L77
Part NumberBTY-L77 P/N:1781-33/2500 S
Battery Voltage11.1V
Battery Capacity7500mAh/83.25WH

Questions about this item

How do I install the BTY-L77 battery in my MSI GT72, and what step do people often miss?

Slide the pack into the bottom bay until the latch clicks; the step many miss is fully tightening the captive screw that locks the 9-cell unit in place.

What maintenance or replacement will the BTY-L77 need later?

The 9-cell Li-ion pack has no user-serviceable parts; replace the whole battery when run-time no longer meets your workload.

What limit appears first on the BTY-L77 during sustained heavy use?

The 11.1 V 7500 mAh cells will hit thermal limits before the 83.25 Wh capacity is exhausted, causing the pack to throttle output.

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