BatteryCharger
Flashlight Enthusiast
Ok, not quite about flashlights, but...
I happen to have a bunch of 6v, 4.5ah lead calcium SLA batteries with not much to do. (the type used for backup in exit signs and such) As I understand it, these are the "LSD" version of lead acid batteries. I was thinking of making a six pack (18v, 9ah) of batteries to keep in my truck for emergency jumpstarting. I don't think the batteries are strong enough for a direct "jump", but if I made an 18v pack, and attached that to a "dead" 12v battery, would it charge? Would I need a resistor or something between the batteries to stop an infinate amount of current from flowing? Or would it be smarter to try the same thing with a full 12v battery pack and dead 12v battery?
I happen to have a bunch of 6v, 4.5ah lead calcium SLA batteries with not much to do. (the type used for backup in exit signs and such) As I understand it, these are the "LSD" version of lead acid batteries. I was thinking of making a six pack (18v, 9ah) of batteries to keep in my truck for emergency jumpstarting. I don't think the batteries are strong enough for a direct "jump", but if I made an 18v pack, and attached that to a "dead" 12v battery, would it charge? Would I need a resistor or something between the batteries to stop an infinate amount of current from flowing? Or would it be smarter to try the same thing with a full 12v battery pack and dead 12v battery?