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| Battery maintenance | Login/Join |
DRR Sportsman |
What you guys like do and there? And do you leave a maintainer of em?  Michael Frizie ET 2471 | ||
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| DRR Pro |
Michael, battery industry engineers recommend keeping batteries fully charged as often as possible. Some examples: *After a race day, fully charge the race car battery as soon as possible. Then, attach a maintainer until the next race outing. *The recommendation is the same for deep-cycle designs. Larry Woodfin | |||
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DRR S/Pro |
I keep a maintainer on my race battery, lawnmower battery and tractor battery 24-7. I believe it makes them last longer. | |||
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| DRR S/Pro |
I put my car in the trailer on Nov 15, 2025 and just got the trailer out of the garage and car out of the trailer today in 30* weather. This battery has sat unattended for 4 months. Odyssey says battery does not need charging if over 12.70v. mem…. i never charge battery at track….NEVER!!!  | |||
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DRR Trophy |
Seems like a good time to ask a question I've been thinking about. What's the least battery voltage before it starts causing issues? I measure my voltage after every run, before hooking up the charger. Also prior to firing up to head to the lanes. So far, the lowest I can recall is close to 12 flat. I keep it on a battery tender at all times when not at the track. When I remove the tender, it typically shows as high as 13.2vdc. When I get to the track it's settled to around 12.8vdc. After 1st pass I'm down to around 12.3vdc. Charging between rounds gets me close to where I started, but never fully charged. So far the lowest I recall it going after a pass is 12.05vdc. It's an older Optima red top. I always bring a spare out of one of my trucks at home, just in case. I don't run an alternator and car isn't loaded with electronics. Just the MSD ignition, water pump, fan which doesn't get much run time, fuel pump and of course the starter, which I hit maybe 3-4 times from leaving the trailer to pulling into the water box. Thanks... William Kilduff 1970 Barracuda 1968 Camaro X2 1968 Caprice 1964 F100 | |||
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| DRR S/Pro |
William, I don't remember seeing less than 12.6 on mine after a run. I have a small digital gauge right above my charging lugs that I can look at when I walk by on the outside of the car. I do run an alternator though. | |||
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| DRR Sportsman |
Keep them charged and on tender whenever possible. I preach it but not good at it. When I put my new garage up I have 4 gang outlets every 8ft on every wall so I am far better now at it. I think batteries are sorta hit or miss - Ive had one in my side by side that never got run and never was on tender last 7 years. And others that I was always after to keep good last much less. Definitely keeping them full gives you a better chance. | |||
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| DRR S/Pro |
I keep my XS D1600 on their (XS) Intell-Charger 7/24 while charging at a constant 18.0 volts. I've done that for the past 5 years and it has never failed me. I also have a House of Payne 16 volt super mini-alternator. I have a second Turbo-Start 16 volt battery that was donated by my son Rob (He went to a 16 volt lithium). I charge it using the same process, 7/24 @ 18.0 volts (it's a second back-up XS Intell-Charger. Same results, three years on that one. Bob | |||
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DRR S/Pro |
In winter, I have about 15 batteries in one corner of the garage, and I can have maintainers on 5 at a time. Just rotate them around every couple weeks. During the season, when racing multi-day events I'll generally throw a maintainer on after the car is loaded up and leave it on all night. In the past, I've gone entire seasons without ever putting a charger on either car and that worked fine too. During the week, everything is stored a decent drive from my house, so it's not possible to plug anything in. Tony Leonard | |||
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DRR Top Comp |
I think all vehicles need to have battery maintainer on them if they are sitting for any amount of time or if they have a parasitic draw. Once the battery loses charge it never really comes completely back. Keep it topped off they last a very long time. https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge. Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue. 4X NE2 CHAMPION. 2020 TDRA NE2 Champion | |||
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