One thing I have learned to watch and or keep an eye on, is the center pin on your atty, if the delrin insulator fails or gets nicked up, the center pin can touch the side of the male 510 thread. This happened on my Kanger Giant tank, rendering it useless, thank god I had it on a regulated device and not a mech mod lol, it read short and shut off the power. I would wager that this is the culprit for many mods going into short mode and causing batteries to vent. The RDA's that are cheaper or less expensive clones will most likely be more affected by this issue as the well made ones have better insulators and pins. Fatdaddyvapes.com sells replacement insulators in a few common sizes, probably worth having some on hand. Also, keep your threads on your mod clean, keep your battery wrappers nice and clean and free from nicks and or scratches as well, if your battery gets scratched, just rewrap them, easy to do with a hair dryer!
Here is a link to Fatdaddys.com shop page, lots of goodies for us vapernauts. Including the delrin inserts
http://www.fatdaddyvapes.com/shop.html
Here is a link to the battery wrappers I use, I rewrap all my new batteries, some mods will allow for double wrap as well, extra protection!
These are for 18650 batteries, they come in multiple colors as well as translucent colors and clear for those who prefer to double wrap.
http://www.illumn.com/batteries-cha...pvc-wrap-safety-orange-pre-cut-10-pieces.html
keeping your threads clean and clear of debris is important due to the fact they complete your negative current. You can use steel wool and be soft when cleaning the threads, then you can use a conductivity grease to help protect your threads and help with current. Here is a link to some.
http://www.illumn.com/pv-devices-dr...l-electrical-grade-conductive-grease-2oz.html
Here is a link to a fitting brush,
be gentle with them, you can also pick this up at any homedepot ,lowes or any other plumbing supply house.
http://www.homedepot.com/p/HDX-1-2-in-Heavy-Duty-Fitting-Brush-80-718-111/204258908
I would recomend getting an ohm meter to make sure your resistance is suitable for your battery type as well.
http://www.lightningvapes.com/products/cartomizer-and-atomizer-ohm-meter
and lastly, get a battery charger that will tell you what volts your batteries are before and during charge, it will help you get used to recognizing the volt drop and usage of your battery. Something I am still learning as well
http://www.illumn.com/batteries-chargers-and-powerpax-carriers/chargers/nitecore-d4-digicharger.html
and if you feel your loosing to much voltage when firing your mod, one of these fellows wouldn't hurt. More for testing your mods ability to fire hard or soft. Not the most important, but could help you find when you might be incurring a problem or when a problem is arising.
http://www.lightningvapes.com/products/assembled-volt-indicator-inline-meter-clear
I have used all of the websites listed above and can vouch for their integrity and great service.