Bosch 4 Amp-Hour; Lithium Power Tool Battery in the Power Tool Batteries & Chargers department at Lowes.com
2 x Bosch GBA ProCORE 18 V 4.0 Ah batteries in a box : Amazon.de: DIY & Tools
Factory New 18v 4.0ah Lithium-ion Battery For Procore 1600a016gb For Bosch 18 Volt Max Cordless Power Tool Drills, Free Shipping - Rechargeable Batteries - AliExpress