Well while we are on Motorcycles and stupid subject.
The battery on my bike died, and I didn't at that time have a proper way of charging it. (I was at my house, here's my man card)
But I had a solution
I stripped the ends off an extra laptop power supply I had lying around and duct-taped the leads to the battery terminal. 18 volts and 3.5 amps of battery charging goodness!
After about half an hour I noticed a rather acrid smell coming from the battery and observed the sides to be slightly bulged out. That seemed about the time to stop charging it and I put it back in the bike and it started right up
I'll take my man card back thank you very much.