They are brand new and only cycled a couple of times and stored in a closed cabinet. However, after a few days inside the cabinet it smells really bad when I open the door. What could be the problem? Is the smell dangerous? Hello, don't worry, this is the smell of electrolyte inside the battery, lithium hexafluorophosphate.
Why does my battery smell like rotten eggs?
Hydrogen sulfide gas is toxic and can harm humans and animals if inhaled. In addition, the gas is highly flammable and can pose a fire hazard if it builds up in an enclosed space. Therefore, if you notice a strong smell of rotten eggs coming from your battery, you must take action immediately. How to Fix a Battery That Smells Like Rotten Eggs?
Do car batteries smell like rotten eggs?
Yes, we've all been there before when charging a 12-volt, or other lead acid battery. Car batteries, golf cart batteries, marine batteries, forklift batteries, lawn mower batteries — they are all capable of smelling like a hidden Easter egg that was never found. Why exactly is your car battery or other lead acid battery smelling like rotten eggs?
It is best to check the voltage with a voltmeter or multimeter when your battery smells like rotten eggs, and then to unplug it afterward. The voltage might give you an indication as to what was happening.
Propylene and ethylene carbonates are supposed to be odorless, and Pubchem says diethyl carbonate has only a "mild pleasant odor". Regardless, it's a good idea to avoid breathing it, so you could keep them in one of those airtight bins with a rubber gasket.