Is a dead car battery ruined?

The lead acid batteries in cars are designed to provide the huge current needed to start the vehicle. They do that well, they don’t do very much else well. These batteries become damaged if they are drained to less than 80%, draining it dead will very likely kill it completely.

What to do if your battery goes dead when plugged in?

If the voltage does not go up when plugged in, look for a blown fuse in the charge circuit in the converter/charger. Look also for any electronic disconnect switches that totally isolate the battery system.

Why did my engine batteries go dead after only a few weeks?

Parked the coach. It set for about three weeks. Went to start it and found the engine batteries completely dead. House batteries fine. Could not find anything left on. Why? Things have been fine up till now. I have 2005 Itasca horizon 400 Cummins. I think batteries were new Jan 2011. Off brand batteries. Welcome to the FMCA Forum.

What does it mean when your RV battery goes dead?

The fact that the lights got brighter when you started the engine is an indication that the batteries are indeed very low, if not completely dead. The engine alternator was simply providing the DC voltage while the engine was running.

Why does my coach battery go dead when plugged in?

If you can measure an increase in DC voltage at the battery bank when the coach is plugged in, then the battery charge circuit is at least complete and probably working. If the voltage does not go up when plugged in, look for a blown fuse in the charge circuit in the converter/charger.

What causes a battery in a camper to die?

Camper batteries can die for many reasons, these being age, overcharging, undercharging, too much device draw, parasitic loads, or not enough amp hours. Taking care of your batteries is the first step to prevent them from dying. The number one takeaway is to never let a Lead Acid battery drop below 50% state of charge.