Thread: Battery charger question

Be sure your charger is designed to charge the optima batterys. Leave both batterys connected together.....connect a charger bank up to each battery.

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Thanks G..... My old Schumacher charger would shut off showing full charge and the test button on my tm would show only 2 bars. When I hooked this new charger up and turned it on it only had 1 light on on either bank. After four hours both Banks are flashing green. The tm test says full charge.

#1 you got a heck of a deal on one of the best chargers made
#2 you can do it one of 2 ways. You can hook each side to each battery seperatly and leave your jumper in place.
#3 you can hook one leg to one trolling battery and leave jumper in place and still charge both batteries and hook the other leg to cranking battery. Depending on amp out put will determine how long it takes 1 leg to charge both batteries.

#3 is how I have my 2 bank 5 amp per bank set up on my 12 volt system with 2 batteries for trolling. Never had a problem charging both overnight except 1 time in 5 years.

I would like to be able to use # 3, except my cranking battery is about 20 ft. From the charger and trolling batteries. What gauge wire would I need to run to connect the cranking battery? By the way this charger is 15a per bank

Man hope you walked away backwards, heck of a deal. Go to tip of wire and clip off ring eye. Splice in some good multi strand 10 gauge wire and put new ring eyes on. Some chargers have temp sensor in wire between charger and fuse. You don't want to mess with that. Adding extension won't hurt anything done that way. Make sure you solder your connections and heat shrink.

with that charger I would remove the jumper between the batteries and charge them separate !!! if you charged connected that would be charging them at 30 amps I don't think they could handle that !!!

being wired parallel you actually have 1 big battery bank !!!

Yeah Cray, guess I got lucky on this one. My cables do have the fuses inline. I feel sure that 15a is enough to charge my trolling batteries overnight so I'm gonna do as you suggest and wire up bank 2 to the starting battery.

Originally Posted by deltabull

Yeah Cray, guess I got lucky on this one. My cables do have the fuses inline. I feel sure that 15a is enough to charge my trolling batteries overnight so I'm gonna do as you suggest and wire up bank 2 to the starting battery.

Run into anything just pm me.