Time for a stooopid question

purplewg

I have a EZ-GO stock except for the lift. Batteries are fairly new 36V. I use it to spray fence lines and other stuff with a tank mounted in the back. I have noticed it seems to run along at a creep and then all of a sudden it is like it just dies. I stop and let it set for a few minutes and it takes off again but it won't last long after that.

I have been running the sprayer pump off of the batteries in the cart. I go across two 6v's. I have been periodically changing the two batteries for two others during this. It doesn't seem to matter much. I don't recall the amperage required to run the little 12v pump but I don't think it is much.

Yesterday it got to where if I sprayed and the cart stopped if I waited a couple minutes it would go but spraying it would quit within a minute or so. If I did not spray I could drive the cart around at what felt like full speed with no problem.

Should I put a separate battery in for the sprayer?

BGW

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camaroluvz28

Putting in a seperate battery is one way of solving this...another way would be too add a voltage reducer from 36 volts down to 12 which would give an even draw across the whole pack instead of just running off two batteries.

purplewg

Good idea. I have an extra battery laying around though.

I just don't get the part about it taking off and running pretty good without the sprayer after letting it sit a couple minutes. I know batteries recover some when not being drained.

camaroluvz28

Not sure on that one, do you know year and condition of batteries...may help to check water level and test with a battery tester or multimeter under a load. Most batteries will have year printed on neg post...will say something like c1 where c is the month(March) and 1 is the year(2011)

purplewg

I will check thanks.

purplewg

OK, I tried the voltage reducer with a full cart charge. Did the same thing, cart bucked and stopped much sooner than it should have while running a little sprayer pump. I took an old bad 12v battery and stuck it in the back and connected the sprayer to it. Runs like a top. Now, why would an old battery that would not start my Jeep work fine but good carts batteries don't work very good?

rib33024

ok, how old are the batteries?, what kind of batteries are they, after a full charge before you use the cart for the day, take a pack volts reading, ??, now hook your DMV meter to the battery pack and take it for a ride and notice what the volts drop to ??, now hook your meter to each battery and do the same thing and tell us what readings you get, i say it's a bad battery or an old pack, -- thats my 2 cent

camaroluvz28

I agree with rib...theres no way your old 12v car battery should work and 6 golf cart batteries wont unless one or more are weak.

purplewg

I agree with both of you. What I did yesterday was the take the GF's G22 with 48V system and hook the same sprayer up to it. Her cart started doing the very same thing in say 20-30 minutes. I hooked up the sprayer motor to her reducer.