IT WORKED! :D

I did not hook my battery up with the 16V charger as I felt the risk would be too much (its a pretty new battery will update if I try it though).

With the 12V charger things worked fine. I did not find any heating in the adapter or the battery. The adapter just got mildly warm when the voltage reached close to 12V. The first time I charged my battery for nearly 3 hours, did get a crank which was better than the state I found my battery in, but not enough to start it. Next day I charged it for 6 hours and it provided enough power to start my engine.

I wouldnt recommend charging this way but, its a nice handy trick to have in case you need it someday.

IT WORKED! :D

I did not hook my battery up with the 16V charger as I felt the risk would be too much (its a pretty new battery will update if I try it though).

With the 12V charger things worked fine. I did not find any heating in the adapter or the battery. The adapter just got mildly warm when the voltage reached close to 12V. The first time I charged my battery for nearly 3 hours, did get a crank which was better than the state I found my battery in, but not enough to start the car engine. Next day I charged it continuously for 6 hours and it worked.

I wouldnt recommend charging this way but, its a nice handy trick to have in case you need it someday.