1S 450mAh 75C LiHV Battery with BT2.0 Connector (5pcs)
The best 1s batteries seem to be the ones with the Ph 2.0 connector attached to the body of the battery instead of on a short lead. My Mobula 6's leads are
Introducing A30 Battery Connector for 1S LiPo: Competitor for BT2.0, Successor to GNB27 - Oscar Liang
Amazon.com: NIDICI 20pcs(10 Pairs) 1S Charger 3.7v Charging Cable Male & Female for 1s Lipo Battery RC Quadcopter Drone Multirotors : Toys & Games
Popular battery connector for LiPo Batteries
500mah+1s+3.7v+25c+Lipo+High+Current+UMX+Connector for sale online | eBay
Tiny Whoop Parallel 1S Charging Board For Sale |RaceDayQuads
Best LiPo battery connectors: How to choose & setup -