Ok so 1 have one bad battery(pass) in my truck and my second battery(driver) needs to have a charger on it at night so itll start the next day (is going bad quicker than id like). Well this has been goin on for about 3 wks as i havent had money to buy batteries.

Anyway, today i go out to go somewhere, start my truck and take the charger off it. I smell a rotton egg/sulphur smell emitting from the drivers side battery. I have smelled this some in the past week but not nearly as bad as today. So i go ahead and make my arrends. I stop at one place to run in and leave my truck running. I come out 5-10 min later and my cab is FILLED with this rotton egg/sulphur smell. Ive never had this happen yet, and everytime i stop for a stop light or stop sign i smell it as soon as i start to go again. When i got home i shut the truck down and opened the hood and stuck my nose down by the drivers side battery at the corner of the "cap" on top of the battery. I could smell a VERY strong rotton egg/sulphur smell coming from that.

What is causing my battery to make this smell and is there anything i can do to stop it.

 

Got a cell or two overcharging, causing the acid to boil. Which in turn is releasing acid gas.

 

13 % sulfuric acid in the batteries and when they boil you get the smell. Overcharging will boil the water out of the batteries. Just a note, when you can replace both batteries as a bad one will kill a new one.

 

Acid gas is nothing to play with, it can kill you fast. Please change out your batteries.

 

Also, in addition to changing the batteries, if you ever need to keep them charged like that in the future, DO NOT use a regular charger! use a Battery Tender type charger, or "Trickle Charger", they will only supply enough juice to keep them charged and not overcharge them...

 

yeah, be careful when you pull the batteries out as you may find acid leaking as well, either way, time for 2 new batteries.

 

No Smoking