We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular black lithium-polymer phone battery, 71.5 by 58.45 by 4.55 mm

Cameron & Co

Cameron & Co DS-CS-MUM430SL 3.85V 3000mAh cell phone battery

SKU CH-KK5W-SZV7A MPN DS-CS-MUM430SL

Lithium-polymer replacement cell delivering 3.85 V and 3000 mAh for Xiaomi M4i and X9 handsets

  • Li-Polymer chemistry delivers stable 3.85 V output
  • 3000 mAh capacity provides extended talk and standby time
  • Exact 71.50 × 58.45 × 4.55 mm fit for Xiaomi M4i and X9
  • Replaces original BM33 part number with 100 % OEM compatibility
  • Black finish matches the handset’s original look

What this battery replaces

This Cameron Sino DS-CS-MUM430SL is a 3.85 V 3000 mAh lithium-polymer cell built for the Xiaomi M4i X9 BM33 smartphone. It supplies 11.55 Wh of energy and matches the original BM33 part number. The pack is sold new and in black.

Check your phone before ordering

Confirm that your handset is the Xiaomi M4i or X9 model and that the existing battery carries the BM33 code. Verify the voltage reads 3.85 V and the capacity is 3000 mAh. The replacement measures 71.50 x 58.45 x 4.55 mm so the battery compartment must accept those dimensions.

Build and daily handling

The lithium-polymer pouch is encased in a rigid black shell that resists flex during insertion. No cables or separate connectors are included; the cell mates directly with the phone’s internal contacts. Its slim 4.55 mm profile keeps the original device thickness unchanged.

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-MUM430SL

Questions about this item

Does the box contain only the DS-CS-MUM430SL battery or are tools and adhesive strips included?

The package contains one DS-CS-MUM430SL lithium-polymer cell rated at 3.85 V and 3000 mAh. No screwdrivers, pry tools or adhesive strips are supplied.

Should I choose this 3000 mAh version or a higher-capacity alternative for my Xiaomi M4i X9?

This model matches the original BM33 specification of 3000 mAh and 11.55 Wh. No higher-capacity variant is listed for the M4i or X9 in the compatibility data.

What does the 3.85 V 3000 mAh rating mean for daily runtime in a Xiaomi M4i?

The 11.55 Wh energy capacity restores the factory runtime for the M4i and X9. Voltage and capacity match the original BM33 cell, so screen-on time and standby return to as-new levels.

More in Replacement Phone Batteries

Similar items