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Black rectangular 9-cell laptop battery with label showing 8960mAh 11.1V 57++

BFKK

BFKK 8960mAh 9-Cell 57++ laptop battery for ThinkPad T440P T540P W540 W541 L440 L540

SKU CH-CEMW-CEFDY

Replacement 8960mAh 9-cell 11.1V battery for compatible ThinkPad T, W and L series laptops

  • Extended runtime from 8960mAh 9-cell capacity
  • Reliable power at 11.1V for ThinkPad models
  • Broad compatibility across T440P T540P W540 W541 L440 L540
  • Safety certified by CE and FCC standards
  • Long service life with up to 500 recharge cycles

8960mAh 9-Cell Replacement Battery

This 57++ battery delivers 8960mAh capacity at 11.1V for compatible Lenovo ThinkPad models. It is a new component rated for up to 500 recharge cycles over its lifespan. The pack suits owners of T440P, T540P, W540, W541, L440 and L540 series laptops needing a direct replacement.

57++ Form Factor and Voltage Match

The single specification that determines fit is the 57++ form factor combined with 11.1V output. Your laptop must accept this specific physical design and voltage; other ThinkPad batteries with different cell counts or form factors will not seat or function correctly in these models.

Pre-Installation Conditioning Cycle

The supplier notes that a new pack may not be recognised on first insertion; reseating the connector usually resolves this. They advise discharging to 10-20 percent, then charging and cycling three to four times to wake the cells. This conditioning step restores full reported capacity and stable runtime.

Highlights

  • Extended runtime from 8960mAh 9-cell capacity
  • Reliable power at 11.1V for ThinkPad models
  • Broad compatibility across T440P T540P W540 W541 L440 L540
  • Safety certified by CE and FCC standards
  • Long service life with up to 500 recharge cycles

Specifications

No published specifications for this item yet.

Questions about this item

How long will the 8960mAh capacity actually run my ThinkPad T440P?

The 8960mAh 9-cell 57++ battery delivers up to 500 recharge cycles; real-world runtime depends on your workload, screen brightness and power settings

Does the 11.1V rating match the original Lenovo 45N1152 specification?

Yes, this replacement is rated at 11.1V and lists part numbers 45N1152 45N1153 45N1162 45N1163 45N1145 45N1147 45N1149 0C52864 0C52863 for direct compatibility

Will the 9-cell 57++ form factor fit my W541 without a chassis gap?

The 9-cell 57++ design matches the original ThinkPad T440P T540P W540 W541 L440 L540 battery bay; if not recognised at first, reseat the connector and cycle the charge three to four times

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