![]() The battery smoothes out or reduces high voltage spikes, which can occur in a vehicle’s electrical system when loads are abruptly shut off. The battery also acts as a voltage stabilizer in the electrical system. ![]() This glass mat material helps reinforce the battery’s internal components improving it’s ability to withstand the demands of multiple accessory loads (your vehicle’s many electronics). Special micro-fiber glass mats absorb the acid so the battery will not spill or leak. East Penn’s AGM or Absorbed Glass Mat batteries have no free-flowing acid. This means that your battery must also help power all the electronics and accessories that come installed or that are plugged into your car or boat. The battery also supplies the extra power necessary when the vehicle’s electrical load requirements exceed the supply from the charging system. The main function for most vehicle batteries is to supply power to the starter and ignition system so the engine can be cranked or started. ![]() Not only does it provide the power to start your vehicle, but it also plays other important roles in its operation of your vehicle. Having a battery you can trust is more important than some may realize. Every now and then I notice my battery gauges are showing 15 volts, I blame on it on the old OMC 35 amp charging system going bezerk, parts are all new but has always been finicky, should probably take note of where the batteries were before I started the engine (haha may actually go take a peek tonight before I forget about it for the winter!).Does a battery do anything else besides start my vehicle? Hasn't failed yet but I guess I know what to look for. Have one of those old Guest chargers, a 3 bank, probably similar vintage, in my skiff. So basically all the stuff that is on all the time you can kill via the breakers, rest is controlled by the battery switch. I feed the bilge pumps, with a fuse in between, after those breakers. I put breakers on those mostly for safety but also so you can shut the batteries off completely. On the ACR, yes they must draw something as they are always trying to operate. May be the temperature difference we see, Cape gets plenty cold but my impression was always the weather is a little different - the birds are chirping around there when we are still locked into winter A quick look at the winter lows, I am on the NH/MA line within ~10 miles of the coast, cape appears to see mid 20's, where I'm at it's mid teens. A $20 trickle charger with clamps is probably close to the most unsafe thing other than a larger version of the same cheap chargers, I have seen those things almost catch fire just from running them on a generator. No doubt, I get the part about an electrical thing going bezerk but a real on board marine charger, permanently connected with fused outputs, plugged into a GFI breaker, it is fairly safe. Part of the idea there is that's just how you keep your batteries year round, for instance at the dock I always want to get in the boat w/ batteries fully charged. maybe though I will put up with them being a little weak for the last year. How long do you get out of batteries that way? I seem to usually get 7 years out of the run off the mill Everstart, Duralast, automotive store variety of marine batteries keeping them on the charger. Even the AGM in my bike in the garage, it's good for about 2 months of non use and it's not going to turn the bike over whether it's new or a couple years old, and any vehicle I've had that was not used for extended periods, same for boats just instead of one battery it's 3 or 4 - I seem to have friends that go through this every year "my batteries won't charge, something is wrong with ", come down to the boat and the charger and/or ACR's are in a protection mode because they sense < 8 volts or some ridiculous thing, battery switches all were off, batteries just die after 6 months. I believe that it works for you but can't understand how that works so reliably, where are you located? I've never seen a battery you could really rely on staying charged all winter.
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