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Black rectangular lithium-polymer laptop battery with connector strip

Beisite

Beisite BTY-L77 31CR19/65-3 11.1V 83.25Wh laptop battery

SKU CH-TMA8-FTD0F

Lithium-ion 11.1 V 83.25 Wh replacement battery for MSI GT72, GT72S, GT80 and WT72 series laptops

  • Battery typeLithium-Ion
  • Battery voltage rating11.1 V
  • Battery capacity83.25 Wh
  • Product colorBlack
  • Product typeBattery
  • Compatible withFor GT72 2QD 2QE 6QD GT72S 6QF GT80 GT80S WT72 Series
  • 25 Wh capacity powers extended work sessions
  • 1 V lithium-polymer chemistry delivers stable voltage
  • Replaces BTY-L77, BP-1781-33/2500 and MS-1784 parts
  • Fits GT72, GT72VR, GT80 and WT72 series laptops
  • Brand-new condition ensures full cycle life from day one

Replacement battery for GT72 and GT80 series

This 11.1V lithium-ion battery replaces the BTY-L77 pack used in a wide range of MSI GT72, GT72VR, GT72S, GT80 and GT80S models. It matches the original 31CR19/65-3 part number and the BP-1781-33/2500 series codes. The black Li-polymer unit is supplied new and carries a 12-month warranty. It is intended for owners of those specific notebooks who need a direct swap for a worn or failed pack.

Fits without chassis changes

The battery slots into the existing compartment of compatible GT72 2QD, 2QE, 6QD, GT72S 6QF, GT80 and WT72 chassis, so no case modification or adapter cable is required. It frees the user from relying on AC power once the original pack no longer holds a useful charge. Builders who need a different voltage, a higher capacity or a form factor for another laptop series cannot use this unit.

Steady output under sustained load

The 83.25Wh rating is designed to maintain the rated 11.1V through extended gaming or rendering sessions rather than only in short bursts. Lithium-polymer chemistry helps the pack deliver consistent current while the notebook draws peak power from the GPU and CPU. Users who need longer runtimes than this capacity provides will have to carry a second pack or stay plugged in.

How it compares

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

Price $46.99
Pricier than about 79% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameBTY-L77
Model nameBTY-L77
Part number31CR19/65-3
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating11.1 V
Battery capacity83.25 Wh
Compatibility
Compatible withFor GT72 2QD 2QE 6QD GT72S 6QF GT80 GT80S WT72 Series

Questions about this item

How long will the 83.25Wh capacity last before it drops under heavy load?

The 83.25Wh lithium-ion pack delivers up to 11.1V; actual run-time under sustained load depends on the laptop's power draw and the battery's age.

Does the battery get hot or make noise when the laptop runs all day?

The battery itself has no moving parts and produces no audible noise; heat output varies with the host laptop's cooling and charge level.

Which specific laptop models must I already own for this BTY-L77 to fit?

It replaces part numbers BTY-L77, BP-1781-33/2500, BP-1781-33/2500S, MS-1784 and 31CR19/65-3 and fits GT72, GT72S, GT80, GT80S and WT72 series models listed.

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