This adapter lets a Milwaukee M18 battery power Kobalt 24V cordless tools. The M18 battery is 18V and Kobalt 24V tools expect 24V. A DC-DC converter inside the adapter holds the output where a fully charged 24V battery would sit. It works in one direction only: Milwaukee batteries powering Kobalt tools.
The battery side of the housing is injection-molded ABS, and the tool side is 3D-printed ABS. The contacts are copper. Built-in battery protection electronics (BMS) cut power before the battery is drained too far.
Use a battery of at least 3 Ah; 4 Ah or more is better. A smaller battery can sag under the heavier draw until its own protection cuts out before it is empty. Some Kobalt 24V angle grinders may need a short restart because of the delayed output protection. Turn the switch on briefly, wait about 3 seconds, then turn it on again. Most drill-style tools do not need this step.
- Battery
- Milwaukee M18 (Lithium-Ion), 18V
- Compatible tools
- Kobalt 24V (Lithium-Ion)
- Direction
- Milwaukee battery to Kobalt tool only
- Housing
- ABS (injection-molded battery side, 3D-printed tool side)
- Terminals
- Copper
- Current rating
- 55A continuous; 100A peak at 18VDC for up to 2 seconds
- Power
- 1188 W continuous at 21.6V nominal
- Protection
- Built-in BMS
- Recommended battery
- 3 Ah minimum; 4 Ah or more is better
- USB port
- No
- Charging
- Cannot charge batteries; remove the battery before charging
- Weight
- 142 g (5.0 oz / 0.31 lb)
- Colors
- Red, Black
- Operating temperature
- -10 °C to 50 °C (14 °F to 122 °F)
- Operating humidity
- 5–95% RH
- In the box
- Battery adapter
- Warranty
- 12 months