How to hack a dead battery of a cordless vacuum cleaner?
I've got an old cordless vacuum cleaner with an old short lasting battery, so I decided to hack it in order to use it on the plug directly ( I'll be using the output of its charger).
The cordless vacuum cleaner has a battery of 3.7 V and a 9V DC- 150mA as an output for its charger.
Note: I was not able to see the motor characteristic because it's covered and it was difficult the remove it.
So I disassembled everything and try to plug the output of the charger directly to the motor, the motor didn't work.
I plug the motor directly to its battery = it works
I plugged a 15V - 150mA (from an old printer transformer) => the motor it barely turns (about 1 rpm)
I plugged a 32V - 150mA (from an old printer transformer) => the motor turns very slow but faster than the previous experiment (about 2 rpm)
Can anyone explain what's going on. Why the motor cannot accept DC from chargers?
Thanks in advance