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Rectangular nickel-zinc battery pack 56 by 32.6 by 15.1 mm 1100 mAh 7.4 V

Cameron Sino SM-621D-BAT 1100mAh 7.4V standard battery

SKU CH-85TT-YQPQ5

A 1100mAh 7.4V nickel-zinc replacement battery for Simolio SM-621, SM-621D and SM-961 wireless TV speakers

  • Battery pack size56 × 32.6 × 15.1
  • Battery typeNickel zinc
  • Battery capacity1,100 mAh
  • Battery voltage rating7.4 V
  • Details56 × 32.6 × 15.1
  • Product typeNickel zinc
  • Replaces Simolio SM-621, SM-621D, SM-961 speakers
  • 1100 mAh capacity gives 8.14 Wh runtime
  • Nickel-zinc chemistry at 7.4 V nominal voltage
  • Compact 56.00 x 32.60 x 15.10 mm fits original bay
  • Built-in protection guards against overcharge and short circuit

Compatible replacement battery

The Cameron Sino SM-621D-BAT is a nickel-zinc replacement cell built for Simolio SM-621, SM-621D and SM-961 wireless TV speakers. It delivers 1100mAh at 7.4V with an 8.14Wh energy rating. The pack measures 56.00 x 32.60 x 15.10mm and weighs 49.0g. A decoded chip ensures the same communication as the original battery.

Thermals and power behaviour

Nickel-zinc chemistry runs cooler than many alternatives during normal charge and discharge cycles. The integrated protection circuit guards against overcharge, over-discharge, over-voltage and short-circuit events. No active cooling is required and the cell operates silently in typical indoor use. Capacity stabilises after two or three full cycles.

Upgrade context

This pack replaces a depleted or failing original battery in the listed Simolio speakers. It restores wireless runtime without modifying the device. The jump is worth it when the original cell no longer holds a useful charge or shows swelling. Buyers who need a different voltage, capacity or form factor should verify their part number before ordering.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $14.99
Pricier than about 67% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameCameron Sino
Model nameSM-621, SM-621D, SM-961, Wireless TV speaker
Part numberSM-621D-BAT
Product typeNickel zinc
Power
Battery typeNickel zinc
Battery capacity1,100 mAh
Battery voltage rating7.4 V
In the box
Battery pack size56 × 32.6 × 15.1

Questions about this item

How do I install the SM-621D-BAT in my Simolio speaker, and what step is often missed?

Remove the old pack, align the connector, and press it in until it clicks; the step many miss is fully seating the connector so the decoded chip communicates with the device.

What maintenance or replacement will this 1100mAh nickel-zinc pack need over time?

Expect gradual capacity loss after several hundred charge cycles; replace the pack when run-time no longer meets your needs.

What limit appears first during sustained use of this 7.4V battery?

The pack's over-temperature protection engages if the internal temperature approaches 60 °C, cutting output until it cools.

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