RE: how long to charge NICD / 12 Volt?
Foosball Movie,
Check the thread, "Charging Question" for wonderful answers to your TX and Rx question.
The 12 volt battery should also be charges at 1/10th capacity. A trickle charge (slightly above 1/50th capacity) is very good for lead batteries. Has been for many many years.
Ken Erickson
San Antonio, TX