charging batteries left in the woods- how long to leave them on

[csport]

My buddies cart broke down on him and he had to leave it where it broke out in the woods-

So it was not charged for maybe a period of time he is not sure how long before he got it out- He has been traveling a lot this summer for work- so circumstances didn't allow him to get back down there

well its at my house and it wouldn't take a charge

The automatic chargeer wouldn't kick in because the batteries were too low
do I went to our place in the country and brought back two more chargers,

so now I have 4 12 volt chargers and all batteries are taking a charge

How long do I leave it on the 4 12 volt chargers before putting it on the 48 volt charger?

thanks
Chris

[Jerj7907]

Assuming we are talking about an RXV or a cart with 4 12 volt batteries. If they were my batteries I would leave each battery on its own charger until they were all fully charged independently. I would then connect the 48 volt charger let it run a cycle. Cut off. Let batteries sit about 12 hours and recharge again with the 48 volt charger. Check voltage and water levels. Hopefully you will still have some life left in them.

[jakesnake27]

I would just charge them up till the 12v chargers stop, then all the batteries should be at full charge...

get them up to at least 12v each then use the 48v charger ... that way they will be equal in charge... when you plug in 48v charger let it charge til it shuts off
it may take a few times to get them up to 50.9 v which is 100% charge , if they ever hit that high

[csport]

sorry I have 8 6 volt batteries
I broke it down to 4 12 volt packs (2x6 volt)

same advice .. charge 2 batteries at a time

[yurtle]

Yep. I'd get them as close to each other as possible before hooking up the 48 volt charger.

Concur with the advise to recharge (48 volt) after initial 48 volt charge.

[scottyb]

In the service business we got calls all the time for charger wont come on.

Once we checked water levels & determined the batteries had simply been drawn down below the level the stock charger could detect we connected a hot wired charger to the pack via alligator clips at the pack mains and started pouring 20-25 amps into the pack.

As soon as the pack reached the minimum detection voltage (usually 24v for a 36v system or 36v for a 48v system) we would plug in the stock charger and see if it would start. IF it didn't start we would wait for 2-3 more volts in the pack and try again.

As soon as the stock charger started we would remove the hot charger and monitor to assure voltage continued to rise. IF yes we could leave knowing the stock charger would finish the charge cycle normally.

If you are using a 12v charger you will have to move around charging in pairs until minimum detection voltage is reached. Otherwise the process is the same. I hope this helps. Visit cartsunlimited.net for more battery charging tutorials.

[yurtle]

I've heard of folks that "jumped" the pack with another pack, to get the charger going. Similar to jumping a car battery, you simply use jumper cables to parallel the full pack with another full pack. Once the charger got going for a little while, the jumper cables could be removed.

[csport]

OK I left 4 12 volt chargers on it, from Monday till friday. the I hooked up the 48 volt charger on friday till last night-

Some only had 4 volts in them when I started and 3 had had less.

Now I have 5 batteries that read 6.7 after resting for 8 hours and the other 3 are right at 6v

the battery charger says its 100%?

So I take it I got three dead, dade, done, dun, cooked batteries