2008Batteries/Power forum
Powering a 9V device from an 18V battery source
18 years old. Gear and prices may have changed since.
What the thread found
- Connecting an 18V power source directly to a device rated for 9V will damage the device.
- A voltage regulator can step down voltage from a higher source to the required level.
- Using batteries that match the device's voltage requirement is a simpler alternative to voltage regulation.
Depends on
- The thread does not document actual testing of the damage claim.
- No specific voltage regulator models or part numbers are discussed.
- The context involves a drill battery powering a monitor, but general principles apply to any voltage mismatch scenario.