I have the reputation on ECF as being a safety advocate, or a fear mongerer, depending upon who you listen to.
I had a battery explode in my first mechanical mod when I began vaping a few years ago. Back then, my experience with batteries had been limited to the alkaline batteries you put in flashlights and portable radios. If you left the power button on in those devices, the battery would just drain until dead. Little did I know that if you (inadvertently) leave the power button on in a mechanical mod that a lithium-ion battery will probably explode.
This incident prompted me to educate myself on batteries and safety practices. I share what I learned in my three blogs:
Deeper Understanding of Mod Batteries Part 1
- For those who want to learn the differences between IMR, IMR/hybrid, ICR, and LiPo batteries. What do those numbers and letters on batteries mean? What's an amp rating and why is it more important than the mAh rating when choosing a battery for vaping?
Battery Basics for Mods: The Definative Battery Guide for Vaping
- A popular and essential read to understand which batteries are safe to use in mechanical and regulated mods. Includes a frequently updated list of recommended safe-chemistry, high-drain batteries with their specifications.
A Beginner's Guide to Your First Mechanical Mod
- Covers the differences between a mechanical vs. regulated mod, essential safety accessories, optional safety accessories to add layers of safety to your mech, routine maintanance, use of proper batteries, proper ventilation, low resistance vaping, battery/mod explosions, and faux hybrid mods.
Self-education, being an informed user, and using common sense are the keys to safety. As others have said above, a regulated mod has protection circuitry against short circuits, timed auto cutoff of the fire button, over and under discharge protection of the battery, etc. Regulated mods which use an internal battery and onboard charging board probably have a higher risk of developing a fire than charging a battery in an external box charger for mods that use external removeable batteries.
When it comes to advanced mass-marketed systems like cell phones, laptops, and hybrid electric cars, the system designers of those products have taken appropriate steps to make them "safe" for uninformed end-user use. Purely mechanical unregulated ecig battery mods and uninformed end-users is a very dangerous mix.
Most consumer battery operated devices are no where near the limit of the batterys operating limits. The high-end flashlights, ecig mods, and remote control toys come to mind as applications that really push the limits of batteries. With the RC toys the device is physically far removed from the person so a mishap is inconsequential. With ecig mods a mishap is literally in the persons face.
The lithium batteries that we use in mods were not originally intended for what we are using them for. In fact, I have read that Panasonic, Sanyo, Sony, and Samsung, don't even like the fact that we're using these batteries because they were not intended for single cell, unprotected use in any consumer device.
These high drain (high current) 18650 lithium batteries have the explosive power of an M-80 firecracker, or 1/4 stick of dynamite. So they contain a lot of energy in a small space. Therefore, we must respect that power by following some basic safe battery practices. You'll find those practices in my above blogs.
mechanical mod explosion
Nearly all of the mod explosions that have been reported in the media recently have been associated with young white males using a mechanical mod who didn't bother educating themselves about their gear or batteries. Many of these have been suspected or confirmed to have been using a particular class of mechanical mod known as a "direct-battery" mod, or "faux-hybrid" mod, and using an incompatible juice attachment on top ... leading to a hard shorted battery which went into thermal runaway. It's also common sense that any user who pushes their batteries beyond their continuous discharge rate, or amp limit, are at a greater risk for an explosion. I'm also an advocate for mechanical mods to have adequate vent holes in case a battery vents inside the mod; with inadequate venting a metal tube mechanical becomes a pipe bomb.
- Practice safe battery habits at all times
- Use only the best batteries you can obtain made by the more reputable manufacturers: LG, Samsung, Sony, and AW
- Inspect your batteries daily for torn insulation wraps
- Avoid short circuits at all costs
- Don't put your batteries in your mod or charger the wrong way
- Use your batteries and mod within their designed limits
- Use common sense, don't transport naked batteries in a pocket or purse where they can come into contact with coins or keys. Protect spare batteries in plastic battery cases.
- If you are new to ecig mods, use a regulated mod over a mechanical mod, at least until you have educated yourself about mechanical mod safety.
One more blog article:
- Guide to help a novice in choosing a charger. Covers recommended brands, suggestions for the number of charging bays you'll need, independent bays, LED or LCD models, and "smart chargers".
IN SUMMARY:
- If using a regulated mod within its recommended use, very little chance for an explosion
- If using a mechanical mod, the risk for explosion is greater because of a lack of protection circuity; the risk could be comparable to using a regulated mod if the informed end user diligently practices safe battery practices. Risk increases proportionately if the end user is uninformed about their gear, if using batteries over their recommended amp limit, or if using a direct battery mod with an inappropriate juice attachment.