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Black rectangular lithium-ion laptop battery with label showing DT9XG 90Wh 11.4V

Beisite

Beisite DT9XG 90Wh 11.4V laptop battery for Alienware Area-51m R1 R2

SKU CH-63RK-KKCTY

90 Wh lithium-ion battery at 11.4 V replaces DT9XG, 7PWKV and 31CP7/54/65-2 for Alienware Area-51m R1 and R2 models

  • Battery typeLithium-Ion
  • Battery voltage rating11.4 V
  • Battery capacity90 Wh
  • Product colorBlack
  • Product typeBattery
  • Compatible withFor Alienware Area-51m R1 R2 ALWA51M-D1968 W
  • 90Wh capacity powers extended work sessions
  • 4V lithium-ion chemistry matches original specifications
  • Replaces DT9XG, 07PWKV and 31CP7/54/65-2 part numbers
  • Fits Alienware Area-51m R1 and R2 models
  • Brand-new condition with 12-month warranty coverage

90Wh 11.4V replacement battery

The Beisite DT9XG is a new lithium-ion battery rated at 90Wh and 11.4V. It replaces part numbers DT9XG, 7PWKV and 31CP7/54/65-2 in Alienware Area-51m R1 and R2 systems. The black pack is built for owners who need a direct-fit replacement for the original cell.

Straightforward internal swap

Installation requires opening the chassis and disconnecting the old pack before connecting the new one. Most builders complete the swap in minutes with basic tools. The main risk is damaging the connector or ribbon cable if the battery is forced before the latch releases.

Steady output during long sessions

The 90Wh capacity sustains the Area-51m through extended workloads without the voltage sag seen in lower-capacity packs. Thermal behaviour remains stable because the cell chemistry matches the original 11.4V specification. Runtime scales with the power draw of the installed CPU and GPU.

How it compares

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

Price $54.99
Pricier than about 85% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameDT9XG
Model nameDT9XG
Part number31CP7/54/65-2
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating11.4 V
Battery capacity90 Wh
Compatibility
Compatible withFor Alienware Area-51m R1 R2 ALWA51M-D1968 W

Questions about this item

How can I confirm the DT9XG battery is working correctly after installing it in my Alienware Area-51m R2?

After installation, power on the laptop and check that Windows reports the battery at 11.4 V and 90 Wh capacity. The charge indicator should light, and the system must run on battery power alone without shutting down.

What comes in the box with the DT9XG battery and do I need to buy any tools or cables separately?

The package contains the 90 Wh 11.4 V lithium-ion battery in black. No additional cables, screws or tools are included; reuse the original hardware from your Area-51m R1 or R2 during the swap.

My original battery is labelled 31CP7/54/65-2 — is the DT9XG the correct replacement?

Yes. The DT9XG replaces part numbers DT9XG, 7PWKV and 31CP7/54/65-2 and fits every Alienware Area-51m R1 and R2 model listed, including ALWA51M-D1968W and ALWA51M-D1733B.

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