Originally Posted by DaleDe
A simple voltmeter would be cheaper and simpler. Just check the pins and compare the voltage output pins with the current model. If it passes this test it is very very unlikely that the unit will blow up.
yes, it's very unlikely that it will blow up, but we still don't know what the device interacts with the battery using the third pin, so it's hard to tell if it will work.
That third pin probably allows communication with a microchip in the battery...