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Rectangular black lithium-polymer phone battery with gold contacts

Cameron & Co

Cameron & Co DS-CS-MUM440XL cell phone battery 4000mAh 3.85V

SKU CH-YD42-MCMYD MPN DS-CS-MUM440XL

Replacement Li-Polymer battery for Xiaomi Mi Mix models including 2016080, Dual SIM and Exclusive Gold Ceramic Edition, 4000mAh 3.85V 15.40Wh, 76.74 x 72.10 x 4.46mm, black

  • 4000 mAh capacity delivers extended talk and standby time
  • Li-Polymer chemistry provides stable voltage in a slim 4.46 mm profile
  • 100 % OEM compatible with Xiaomi Mi Mix, Mi Mix Dual SIM and Exclusive Gold Ceramic models
  • Replaces original BM4C part for a direct fit without modification
  • 40 Wh energy rating supports all-day use on a single charge

Compatible replacement battery

The Cameron & Co DS-CS-MUM440XL is a new lithium-polymer cell rated at 3.85V 4000mAh and 15.40Wh. It is built for the Xiaomi 2016080 Mi Mix series including the Dual SIM and Exclusive Gold Ceramic editions. The unit replaces the original BM4C part and comes in black.

Build integration

This single-cell pack measures 76.74 x 72.10 x 4.46 mm and fits inside the handset’s existing battery cavity without adapters. No extra cables, brackets or software tools are required for installation. It restores the factory power budget so the phone can run a full day on one charge.

Thermals and power

The Li-Polymer chemistry delivers steady output at the rated 3.85 volts with low internal resistance during normal use. Heat stays within the phone’s original thermal envelope and the battery adds no audible noise. Power draw follows the handset’s stock management profile.

How it compares

Measured against everything we stock in Replacement Phone Batteries, at today’s prices. Recalculated every night.

Price $16.99
Pricier than about 65% of the 868 comparable items (median $14.99).

Specifications

Product
Brand nameCameron Sino
Model nameDS-CS-MUM440XL

Questions about this item

How long will the 4000mAh capacity last before the voltage drops under heavy daily use?

The 4000mAh / 15.40Wh rating gives a full day of mixed use; sustained high drain will deplete it faster, so expect to recharge once the voltage falls toward 3.85V nominal.

Does the Li-Polymer cell run hot or make noise during all-day operation?

Li-Polymer chemistry produces no audible noise and stays cool under normal loads; only heavy continuous discharge will generate noticeable warmth.

Which Xiaomi handset must I already own for this BM4C battery to fit and work?

It fits the Xiaomi 2016080 Mi Mix, Mi Mix Dual SIM and Mi Mix Exclusive Gold Ceramic Edition that originally used the BM4C part.

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