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Rectangular black lithium-polymer phone battery with flat edges

Cameron & Co

Cameron & Co DS-CS-MUP900SL cell phone battery 4.85 Ah

SKU CH-5Y6Z-FMY2D MPN DS-CS-MUP900SL

Li-Polymer replacement battery for Redmi Note 9 Pro and Note 9 Pro Max, 4.85 Ah capacity

  • Delivers 4.85 Ah capacity for extended Redmi Note 9 Pro Max usage
  • Li-Polymer chemistry provides reliable power in a 90.00 x 64.70 x 4.50 mm form
  • 85 V nominal voltage matches original BN53 specifications exactly
  • Brand-new Cameron Sino cell ensures 100% OEM compatibility with listed models
  • Replaces BN53 part number across Note 9 Pro, Note 9 Pro Max, M2003J6B2G, M2003J6B1I, M2101K6G

Replacement Battery for Redmi Note 9 Pro Series

The Cameron & Co DS-CS-MUP900SL is a lithium-polymer cell built to replace the original BN53 battery in Redmi Note 9 Pro and Note 9 Pro Max handsets. It matches the OEM form factor and voltage so the phone recognises it without modification. Installers receive a single black unit that fits the existing battery compartment. No additional tools or adapters are included in the package.

4.85 Ah Capacity and 3.85 V Nominal Voltage

Rated at 4850 mAh and 18.67 Wh, the cell restores the runtime the handset delivered when new. It comfortably powers a full day of mixed calling, messaging and media playback on a healthy device. Heavy gaming or continuous navigation will drain the charge faster, requiring a mid-day top-up. The 3.85 V chemistry is identical to the factory specification, so the phone's fuel-gauge remains accurate.

Supplied as a Single Cell Only

The box contains one replacement battery and nothing else. No adhesive strips, opening picks or screwdrivers are bundled, so you must source installation tools separately. There is no software, firmware or calibration utility provided; the handset manages charging automatically. Buyers who need a complete repair kit or a multi-battery charger will have to purchase those items elsewhere.

How it compares

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

Price $20.99
Pricier than about 82% of the 868 comparable items (median $14.99).

Specifications

Product
Brand nameCameron Sino
Model nameDS-CS-MUP900SL

Questions about this item

Will the 90.00 x 64.70 x 4.50 mm dimensions match the original battery compartment in my Redmi Note 9 Pro Max?

The replacement measures 90.00 x 64.70 x 4.50 mm, matching the factory BN53 footprint for the Note 9 Pro and Note 9 Pro Max.

How can I verify the 4.85 Ah Li-Polymer cell is performing correctly after installation?

Charge the phone fully, then check that the reported capacity is close to 4850 mAh and that the voltage reads near 3.85 V in a battery-health app.

Does the package include adhesive strips or tools, or must I buy them separately?

The box contains one black DS-CS-MUP900SL battery only; adhesive strips and opening tools are not included.

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