310mAh Battery for Plantronics Backbeat Sense Wireless Bluetooth Headset Battery AHB403029PS - AliExpress
Plantronics Backbeat Go 2 Review
3.7V Battery Replacement for Plantronics Backbeat Go 2 Earphone Headset Li-Ion Lithium Rechargeable Accumulator+Track Code - AliExpress
Amazon.com: Plantronics BackBeat Go 2 Wireless Hi-Fi Earbud Headphones with Charging Case - Compatible with iPhone and Other Smart Devices - White : Electronics
Plantronics BackBeat Go 2 Wireless Hi-Fi Earbud Headphones with Charging Case - Compatible with iPhone and other Smart Devices - Black - Walmart.com