My dewalt circular saw failed and killed 2 batteries in the process of troubleshooting. Dewalt replaced all 3 with minimal effort. I took apart the batteries and it looks like the inline
Stealthmount Dewalt 20v battery mount holders – BLOWERBAND
Dewalt B DCB184 5.0Ah 18V XR Lithium Ion Battery Twin Pack + DCB115 Charger, Yellow, 2 x 5.0Ah & DCB115 : Amazon.de: DIY & Tools
DEWALT 12-volt Max Sds-plus Cordless Rotary Hammer Drill (Bare Tool) in the Rotary Hammer Drills department at Lowes.com
DEWALT 18V 20V Original Lithium Ion Battery 1.7AH 2AH 4AH 5AH DCB182 DCB184 DCB203 DCB204
DEWALT 20V MAX Lithium-Ion Cordless 3-Tool Combo Kit and Ultra-Compact 5/8 in. SDS Plus Hammer Drill with 5Ah & 1.7Ah Batteries DCK304E1H1W172B - The Home Depot