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Black rectangular lithium-ion laptop battery with label showing 4.4 Ah

Cameron & Co

Cameron & Co DS-CS-TOU400NB laptop battery 4.4 Ah

SKU CH-PVSK-T1F5R

Replacement lithium-ion battery with 4.4 Ah capacity for Toshiba Satellite Pro L640 and compatible models

  • TypeBattery
  • Longer runtime with 4.4 Ah capacity
  • Li-ion chemistry for stable discharge
  • Fits Toshiba Satellite Pro L640 and Qosmio T550 series
  • Replaces original PA3634U-1BAS and PA3634U-1BRS packs
  • Black finish matches laptop chassis

Compatible Toshiba models

This replacement battery fits Toshiba Satellite Pro L640 and numerous Dynabook CX, EX, Qosmio, Portege and Equium models. It is a direct substitute for part numbers PA3634U-1BAS, PA3634U-1BRS and PABAS229. The pack uses lithium-ion chemistry and is supplied in black.

Check your existing battery

Before ordering, confirm the original battery label lists one of the compatible part numbers above. Verify the physical shape and connector orientation match the pack currently in your laptop. Ensure the laptop model number appears in the supported device list supplied by the manufacturer.

Thermal and power behaviour

The lithium-ion cells operate within normal laptop temperature ranges during typical use. No active cooling is required beyond the laptop's own thermal design. Power draw follows the host system's charging profile and the battery's 4.4 Ah capacity rating.

Highlights

  • Longer runtime with 4.4 Ah capacity
  • Li-ion chemistry for stable discharge
  • Fits Toshiba Satellite Pro L640 and Qosmio T550 series
  • Replaces original PA3634U-1BAS and PA3634U-1BRS packs
  • Black finish matches laptop chassis

Specifications

BrandCameron Sino
ModelDS-CS-TOU400NB
TypeBattery

Questions about this item

Does the Cameron & Co DS-CS-TOU400NB arrive with any cables or tools, or must they be purchased separately?

The battery ships as a single unit; no cables, screwdrivers or mounting hardware are included, so reuse the original fixings from the old pack.

How do I decide between the listed part numbers such as PA3634U-1BAS, PA3634U-1BRS and PABAS229 for my Satellite Pro L640?

All three codes reference the same 4.4 Ah Li-ion form factor, so any of them matches the DS-CS-TOU400NB; simply confirm the model label on your existing battery.

What does the 4.4 Ah rating mean for daily runtime on a Satellite Pro L640?

It delivers the same capacity as the original factory pack, providing a comparable number of hours per charge under typical mixed workloads.

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