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Small rectangular nickel-zinc battery pack, dark wrap, connector on one end

Cameron Sino Battery for Bose SoundSport Free Charging Case NTA3522 700mAh 2.59Wh 3.7V

SKU CH-M6J6-KKC2J

Nickel-zinc replacement cell rated 700 mAh and 2.59 Wh restores power to the Bose SoundSport Free charging case

  • Typenickel_zinc
  • Battery Typenickel_zinc
  • Battery Capacity700 milliamp_hours
  • Battery Voltage3.7 volts
  • Replacement battery fits Bose SoundSport Free Charging Case NTA3522
  • 700 mAh capacity delivers 2.59 Wh at 3.7 V
  • Nickel-zinc chemistry with overcharge, over-discharge and short-circuit protection
  • ISO9001, RoHS and CE certified for safety compliance
  • Fully decoded chip works like the original battery

Replacement Battery for Bose SoundSport Free

This replacement battery is built for the Bose SoundSport Free charging case using the NTA3522 part number. It delivers a nickel-zinc cell rated at 700mAh and 2.59Wh with a nominal 3.7V output. The unit is new and manufactured to match the original specifications. A decoded chip is included so the case recognises the battery without extra steps.

Fits Directly into the Existing Charging Case

The cell slots into the charging case without any adapter or soldering. Online installation guides show the connector alignment and case reassembly process. No additional tools or cables are required beyond what the case already uses. The package includes protective foam for safe handling during the swap.

700mAh Capacity Restores Original Case Runtime

At 700mAh and 2.59Wh the battery restores the charging case to its factory energy reserve for multiple earbud top-ups. It supports the same charge and discharge cycles as the stock cell. The nickel-zinc chemistry does not support fast-charge protocols beyond the case’s standard input. Users needing higher capacity or a different voltage should look elsewhere.

Highlights

  • Replacement battery fits Bose SoundSport Free Charging Case NTA3522
  • 700 mAh capacity delivers 2.59 Wh at 3.7 V
  • Nickel-zinc chemistry with overcharge, over-discharge and short-circuit protection
  • ISO9001, RoHS and CE certified for safety compliance
  • Fully decoded chip works like the original battery

Specifications

Brandcameron sino
ModelBose SoundSport Free Charging Case
Part NumberBose NTA3522
Typenickel_zinc
Battery Typenickel_zinc
Battery Capacity700 milliamp_hours
Battery Voltage3.7 volts

Questions about this item

How long does the 700 mAh capacity last before the case needs recharging?

The 700 mAh cell delivers 2.59 Wh at 3.7 V; actual run-time depends on how often the earbuds are docked and the volume level used.

Does the nickel-zinc chemistry run hot during all-day charging cycles?

Nickel-zinc cells typically stay cooler than lithium-ion under continuous charge, and the built-in protection circuit prevents over-voltage and short-circuit heating.

What tools or parts are required to swap the original NTA3522 cell?

Only a small Phillips screwdriver and a plastic pry tool are needed to open the charging case and disconnect the old battery connector.

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