If you have a dual cell, you should be using three AAs for 4.5v
That could be the problem.
I only charge my duals for a minute also.

BTW, your avatar, while a good idea, inspired these humorus thoughts as I read your post:

Turn off your high beams!

Pass if your're gonna!

Shut off your alarm! woooit woooit, aw-aw-aw-aw, weeooweeooweeoo...