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Black rectangular lithium-ion laptop battery, 57Wh 11.4V

Beisite

Beisite 66DWX 57Wh 11.4V laptop battery for Latitude 7340 7440 7640

SKU CH-17S3-KQ2AW

A 57Wh 11.4V lithium-ion replacement battery for Dell Latitude 7340, 7440 and 7640 models

  • Battery typeLithium-Ion
  • Battery voltage rating11.4 V
  • Battery capacity57 Wh
  • Product colorBlack
  • Product typeBattery
  • Compatible withFor Latitude 7340 7440 7640 Series
  • 57 Wh capacity powers Latitude 7340 7440 7640 series
  • 4 V lithium-ion cell matches original 66DWX specification
  • Replaces part numbers 66DWX 047T0 WW8N8 3ICP6/65/78
  • Brand-new condition with 12-month warranty included
  • Black finish fits Latitude 7340 7440 7640 chassis perfectly

What this battery replaces

This 57Wh 11.4V lithium-ion unit replaces Dell part numbers 66DWX, 047T0, WW8N8 and 3ICP6/65/78. It fits Latitude 7340, 7440 and 7640 series laptops and ships in black as a single battery.

Who it suits and who should look elsewhere

Owners of the listed Latitude models needing a direct 57Wh replacement will find the correct voltage and connector. Buyers with other Dell series or a different capacity requirement cannot use this pack.

Check before ordering

Confirm the original battery shows one of the four part numbers above and that your laptop model is exactly Latitude 7340, 7440 or 7640. Verify the existing pack is rated 11.4V and 57Wh before fitting.

How it compares

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

Price $47.99
Pricier than about 80% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand name66DWX
Model name66DWX
Part number3ICP6/65/78
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating11.4 V
Battery capacity57 Wh
Compatibility
Compatible withFor Latitude 7340 7440 7640 Series

Questions about this item

My Latitude 7340 currently uses a 66DWX battery — will this 57 Wh unit fit without modification?

Yes, this battery is built to the 66DWX form factor and matches the 11.4 V, 57 Wh specification for Latitude 7340, 7440 and 7640 models.

I am replacing an older 047T0 battery in a Latitude 7440 — does this 11.4 V pack align with the original voltage?

The replacement carries the same 11.4 V rating and 57 Wh capacity as the 047T0 part, so the laptop’s power management will recognise it normally.

After installing the 3ICP6/65/78 cell, how can I confirm the battery is reporting the correct 57 Wh capacity?

Open the BIOS or Windows Battery Report and verify the design capacity reads 57 Wh at 11.4 V.

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