Ebay batteries?

King Nothing

My wife and I just bought what we think is a 1985 EZGO 3 wheeled electric cart for $200. We were told 3 of the batteries are a year old and the others are older and need replaced. Would it be a bad idea to mix new batteries with year-old ones? I searched "golf cart battery" on ebay and came up with these

Apparently I cant post a link, but they are mighty max 12v 35 amp hour batteries

Has anyone used these? I was thinking of buying 6 and running them in series/parallel. That way I can replace ALL the batteries instead of half of them

BGW

__________________
This advertising will not be shown in this way to registered members.
Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum

Volt_Ampere

It is not a good idea to mix old and new batteries. You will find that the new ones become like the old ones rather quickly.

Clemsoncartguy

I am surprised that you can get a deal off ebay? I would think shipping would kill the deal!

I just looked. They look like half size. There 7"x5"x7" and only weigh 23 pounds or something each?

Clemsoncartguy

One problem is 12v unless your doing that on purpose?

cgtech

35ah batteries are gonna be terrible. So under rated for the job, the battery might pop under the load of full throttle operation, from a dead stop, amp loads will easily exceed 350 amps. Most any battery is gonna be unhappy at discharge above 10c (10x its rated capacity, 35ah).

King Nothing

I was thinking 2 36v banks in parallel

King Nothing

Unless I'm reading something wrong the 6v batteries that are in it now are 20ah. My math, which could be completely wrong, says that the 6 batteries in the cart now are a total of 120ah, and 6 of those 12v batteries are 210 ah. Am I completely wrong here?

JohnnieB

Connecting batteries in series increases voltage, but the storage capacity stays the same.
Connecting batteries in parallel increases storage capacity, but the voltage stays the same.

Attached is a chart from Trojan Battery company that illustrates the concept.

The six 6V 20AH batteries in your cart yields a 36V battery pack with a 20AH storage capacity.

Six 12V 35AH batteries connected is series/parallel will yield a 36V 70AH battery pack.

The standard battery pack for a 36V golf cart is made up from six 6V 225AH batteries connected in series for a 36V 225AH battery pack.

Attached Images

Connecting batteries in series and parallel.JPG (69.6 KB, 0 views)

Volt_Ampere

35 AH batteries are almost useless for a golf cart. You are wasting your $$ with that deal.

Clemsoncartguy

Those are like the size of atv batteries or an accessory battery for something...or maybe a small lawnmower.