Brand NEW Bosch Core 18V 4AH Lithium Power Tool Battery Kit Charger Included GXS18V-15N15! - Mixed Power Tool Sets | Facebook Marketplace | Facebook
Bosch 2-Tool 18-volt Power Tool Combo Kit with Soft Case (2 Li-ion Batteries Included and Charger Included) in the Power Tool Combo Kits department at Lowes.com
Tool Li Ion Battery For Bosch 18v 4ah/6ah/7ah/8ah/9ah Bat 609 619 622 Cordless Power Tools Rechargeable Battery Withlamp Charger - Rechargeable Batteries - AliExpress
Teardown: Bosch 18V Core18 4Ah battery. I've never seen anything like this! - YouTube