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Rectangular black lithium-polymer laptop battery pack

Cameron & Co

Cameron & Co DS-CS-LVS440NB laptop battery 14.8V 3100mAh 45.88Wh Li-Polymer black

SKU CH-PT6H-EJCQ3

A 14.8 V 3100 mAh lithium-polymer replacement battery for Lenovo ThinkPad S3 and S440 series laptops

  • TypeBattery
  • Compatible with Lenovo ThinkPad S3, S431 and S440 models
  • 8 V 3100 mAh capacity delivers 45.88 Wh of power
  • Li-Polymer chemistry keeps the pack light at 7.64 mm thick
  • Black finish matches the original laptop aesthetic
  • Replaces OEM part numbers 45N1138, 45N1139, 45N1140, 45N1141

Compatible Lenovo ThinkPad models

This replacement battery fits the Lenovo ThinkPad S3-S431, S3-S440, S431 and S440 series. It also matches the ThinkPad V4400u and several 20AY sub-models. The pack replaces original part numbers 121500158, 45N1138, 45N1139, 45N1140 and 45N1141.

Check your current part number before ordering

Remove the existing battery and confirm the part number printed on its label matches one of the five compatible numbers listed above. Verify the laptop model name on the bottom case or in the BIOS matches the supported models. The battery is not suitable for other ThinkPad families or non-Lenovo notebooks.

Thermals and power in normal use

The 14.8 V 3100 mAh Li-Polymer cell delivers 45.88 Wh of capacity for typical mobile workloads. Lithium-polymer chemistry runs cool during standard office tasks and video playback. No active cooling is required; the pack relies on the laptop chassis for passive heat dissipation.

Highlights

  • Compatible with Lenovo ThinkPad S3, S431 and S440 models
  • 8 V 3100 mAh capacity delivers 45.88 Wh of power
  • Li-Polymer chemistry keeps the pack light at 7.64 mm thick
  • Black finish matches the original laptop aesthetic
  • Replaces OEM part numbers 45N1138, 45N1139, 45N1140, 45N1141

Specifications

BrandCameron Sino
ModelDS-CS-LVS440NB
TypeBattery

Questions about this item

Does the box contain only the 14.8V 3100mAh 45.88Wh Li-Polymer battery or are screws and tools included?

The package includes one black DS-CS-LVS440NB battery measuring 301.42 x 68.84 x 7.64 mm; screws and installation tools are not supplied.

My ThinkPad S440 shows part number 45N1139 on the old cell — is this the exact replacement?

Yes, the DS-CS-LVS440NB replaces Lenovo part numbers 121500158, 45N1138, 45N1139, 45N1140 and 45N1141 across ThinkPad S3-S431, S3-S440, S431, S440 and V4400u models.

What runtime can I expect from the 45.88Wh rating in a ThinkPad S440 20AY?

The 45.88Wh capacity matches the original 3.1Ah specification; actual runtime depends on screen brightness, workload and battery health settings in the laptop.

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