8.4V 1A USB charger 5.5*2.1mm DC for 7.2V/7.4V 2S18650 Li-ion LiPo battery | eBay
Replacement Battery for Anker SoundCore Boost 2S18650 (2600mAh)
8.4V 1A charger AC/USB DC/Micro USB for 7.2V/7.4V 2S18650 Li-ion LiPo battery | eBay
Li Ion 7.4v 2600mah Rechargeable Replacement Lithium Ion Battery For 2s18650 Soundcore Boost Speaker - Buy Soundcore Boost Battery,7.4v Battery 2600mah Li Ion,2s18650 Battery Product on Alibaba.com
Cameronsino Battery For Anker Soundcore Boost Fits Anker 2s18650 Speaker Battery 2600mah/19.24wh 7.40v Li-ion Blue - Digital Batteries - AliExpress
18650 and Other Cylindrical Lithium Batteries | Higherwire
Battery Replacement for Anker SoundCore Boost 2S18650