Batteries Will Not Hold Charge

abgrant · 01-06-2011, 11:13 AM

The batteries in my 2000 Ez-Go (36V) will not hold a charge. I put them on the charger and when the charger stops its charging cycle, the battery indicator shows a full charge. If I plug the charger back in, its starts charging again.

Is this an indicator that I need new batteries?

dougmcp · 01-06-2011, 01:01 PM

No, all older ferroresonant EZGO chargers start at full and scale themselves back.
Get a digital meter and check your pack voltage and individual battery voltages.
The pack should be at least 38.2v and each battery should be at least 6.37v.

abgrant · 01-16-2011, 01:55 PM

Thanks for the info. Finally got a DVM and my total voltage is 37.3, with two batteries having less voltage than the other four. One battery tests out at 6.03 with one cell that measures 1100 on a hydrometer with the other cells at 1250 and the other battery tests out at 6.21 with one cell at 1200 and the other cells at 1250.

Since the batteries are 3 years old, should I replace the bad batteries or replace all six?

Thanks again for the advice.

dougmcp · 01-16-2011, 02:13 PM

It's always best to replace all batteries at the same time.
IMO, batteries should last from 5-7 years, 3 year old batteries should be OK but yours seem to have not been taken care of.
If you buy new ones, charging and maintenance is the key.

01-06-2011, 11:13 AM	#1
abgrant Not Yet Wild Join Date: Jan 2011 Posts: 2	Batteries Will Not Hold Charge The batteries in my 2000 Ez-Go (36V) will not hold a charge. I put them on the charger and when the charger stops its charging cycle, the battery indicator shows a full charge. If I plug the charger back in, its starts charging again. Is this an indicator that I need new batteries?
abgrant Not Yet Wild Join Date: Jan 2011 Posts: 2

01-06-2011, 01:01 PM	#2
dougmcp Gone Wild Join Date: Mar 2009 Location: Roseville, CA Posts: 2,757	Re: Batteries Will Not Hold Charge No, all older ferroresonant EZGO chargers start at full and scale themselves back. Get a digital meter and check your pack voltage and individual battery voltages. The pack should be at least 38.2v and each battery should be at least 6.37v.

01-16-2011, 01:55 PM	#3
abgrant Not Yet Wild Join Date: Jan 2011 Posts: 2	Re: Batteries Will Not Hold Charge Thanks for the info. Finally got a DVM and my total voltage is 37.3, with two batteries having less voltage than the other four. One battery tests out at 6.03 with one cell that measures 1100 on a hydrometer with the other cells at 1250 and the other battery tests out at 6.21 with one cell at 1200 and the other cells at 1250. Since the batteries are 3 years old, should I replace the bad batteries or replace all six? Thanks again for the advice.
abgrant Not Yet Wild Join Date: Jan 2011 Posts: 2

01-16-2011, 02:13 PM	#4
dougmcp Gone Wild Join Date: Mar 2009 Location: Roseville, CA Posts: 2,757	Re: Batteries Will Not Hold Charge It's always best to replace all batteries at the same time. IMO, batteries should last from 5-7 years, 3 year old batteries should be OK but yours seem to have not been taken care of. If you buy new ones, charging and maintenance is the key.

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