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 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

  • Specifications56.00 x 32.60 x 15.10
  • Typenickel_zinc
  • Battery Pack56.00 x 32.60 x 15.10
  • Battery Typenickel_zinc
  • Battery Capacity1100 milliamp_hours
  • Battery Voltage7.4 volts
  • 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.

Highlights

  • 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

Specifications

BrandCameron Sino
ModelSM-621, SM-621D, SM-961, Wireless TV speaker
Part NumberSM-621D-BAT
Specifications56.00 x 32.60 x 15.10
Typenickel_zinc
Battery Pack56.00 x 32.60 x 15.10
Battery Typenickel_zinc
Battery Capacity1100 milliamp_hours
Battery Voltage7.4 volts

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.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.