Can any other battery fit a rigid drill?

Yes, other batteries can fit a rigid drill, but compatibility depends on the specific model and design of the drill. Many manufacturers produce batteries designed for specific tools, so using a different brand or type may not provide the necessary voltage or fit securely. It's essential to check the drill's specifications and ensure that the replacement battery matches the required voltage and connector type for safe and optimal performance. Always refer to the manufacturer's guidelines when selecting a battery.