2015 EZGo rxv sometimes doesn't charge 100% overnight

[JLavallo]

Hi there
I have a question. I'm not sure if I have a charger issue or is this a Normal phenomena. I have an rxv with 4 12 volt batteries. I'm going into my 3rd year with the batteries. I noticed a loss of range this year. Sometimes when I charge over night the charge meter needle is on the full mark. When I take it out it will deplete quickly. Other times if I charge over night the needle will be pinned beyond the full mark and I get better range.

My batteries are 2018. I just picked it up from a service on Friday. The batteries check out fine when tested. I keep them full monthly and plates look free of sulfate on visual inspection.

It always seems to have better range if you are using it daily. But I never noticed it not fully charging before. Batteries were testing 12.56. I went and installed a 48v powerpulse in hopes it would correct this about 2 weeks ago.

Could this be the delta q charger crapping out? How can I test the Charger? It seems to be intermittent.