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
Small rectangular lithium-ion battery pack with connector 38.4 by 30.7 by 6.6 mm

Cameron Sino 450 270mAh 3.7V lithium-ion battery

SKU CH-2AW2-GC3AN MPN 450

Replacement lithium-ion battery for many Sennheiser wireless headsets, 270 mAh, 3.7 V, 38.40 x 30.70 x 6.60 mm, 9.0 g

  • Replaces original Sennheiser BA-370PX battery for compatible headsets
  • 270 mAh capacity delivers reliable wireless listening time
  • 7 V lithium-ion chemistry matches factory specifications
  • Compact 38.40 x 30.70 x 6.60 mm design fits inside earcup
  • ISO9001, RoHS and CE certified for safety assurance

Replacement battery for Sennheiser headsets

This Cameron Sino lithium-ion cell replaces the original BA-370PX pack in a long list of Sennheiser wireless models including the MM 450, PXC 360 BT and 450 TRAVEL. It delivers 270 mAh at 3.7 V and weighs 9.0 g. The fully decoded chip communicates with the headset exactly like the factory unit. ISO 9001, RoHS and CE certifications are declared.

Who should buy this and who should not

Owners of the listed Sennheiser headsets whose batteries no longer hold a charge will restore full wireless runtime with this direct-fit cell. It is not suitable for headphones outside the compatibility list, for devices that require a different voltage or capacity, or for users who cannot open the earcup to reach the battery compartment.

Critical specification: 270 mAh capacity

The 270 mAh rating determines whether the cell matches the original runtime; a higher or lower figure would change listening time between charges. Verify the part number BA-370PX or 0121147748 on your old battery before ordering. Dimensions are 38.40 x 30.70 x 6.60 mm, so the replacement must fit the same internal space.

Highlights

  • Replaces original Sennheiser BA-370PX battery for compatible headsets
  • 270 mAh capacity delivers reliable wireless listening time
  • 7 V lithium-ion chemistry matches factory specifications
  • Compact 38.40 x 30.70 x 6.60 mm design fits inside earcup
  • ISO9001, RoHS and CE certified for safety assurance

Specifications

BrandCameron Sino
Model450 TRAVEL, 550 Travel, MM 400, MM 400-X, MM 450, MM 450-X, MM 500-X, MM 550, MM-550-X, PCX 360 BT, PX 210 BT, PX 310 BT, PX 360, PX 360 BT, PXC 310, PXC 310 BT, PXC 360 BT

Questions about this item

When will the 270 mAh lithium-ion cell need replacing?

Expect replacement after the cell no longer holds a useful charge; a new pack reaches peak capacity after 2 or 3 full charge-discharge cycles.

What limits runtime during a long listening session?

The 1.00 Wh capacity sets the maximum playtime before the headset must be recharged.

How warm does the 3.7 V pack get when the headphones run all day?

Normal operation stays well below the 60 °C storage limit; avoid charging with low-quality adapters to prevent excess heat.

Also in this aisle

People compared these

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