This adapter lets Craftsman 20V lithium-ion batteries power Kobalt 24V cordless tools. It converts the voltage rather than passing it through, so the tool receives 24V from a 20V battery. It works in one direction only: Craftsman batteries powering Kobalt tools.
The battery interface is injection-molded ABS. The tool socket is 3D-printed ABS, and the contacts are copper. A built-in battery management system (BMS) cuts power before the battery is drained too far.
The adapter is for powering tools only. It cannot charge batteries and must never be connected to a charger. Remove the battery from the adapter before charging, and charge it on the original charger made for the Craftsman 20V battery. Use a battery of at least 3 Ah, with 4 Ah or more better, because a smaller battery can sag under a higher-voltage tool until its own protection cuts out.
- Fits battery
- Craftsman 20V (lithium-ion)
- Runs tools
- Kobalt 24V (lithium-ion)
- Battery voltage
- 20V
- Tool voltage
- 24V
- Housing
- ABS
- Terminals
- Copper
- Current rating
- 55A continuous; 100A peak at 18VDC for up to 2 seconds
- Power
- 1188 W continuous at 21.6V nominal
- Weight
- 145 g (5.1 oz / 0.32 lb)
- Battery protection
- Built-in BMS
- USB port
- No
- Operating temperature
- -10 °C to 50 °C (14 °F to 122 °F)
- Operating humidity
- 5–95% RH
- Recommended battery
- 3 Ah minimum; 4 Ah or more preferred
- Warranty
- 12 months after the date of delivery
- SKU
- PTA-CRA20-KOB24
- Revision
- Revision 01 (released May 19, 2026)