MECHANICAL MOD SAFETY GUIDE
Mechanical Mod Safety Guide
Before using your new mechanical mod there’s a few things to take into consideration. Mechanical
mods, like most mods, use lithium batteries. However unlike regulated mods they have no safety
features e.g. short protection, overcharge protection or overheat protection. Without those safety
features a lithium battery can be potentially harmful. So it’s extremely important you take the proper
precautions when using a mechanical mod.
Only use good reputable batteries
The big three battery manufacturers are Sony, LG and Samsung. It’s best to get a battery from
one of these manufacturers. They are reliable and have been used by vapers extensively.
Batteries not sold as being manufactured by one of the big three are likely a rewrapped battery.
from one of those manufacturers, often with false or misleading limits on them.
Only use a battery within it’s safe limits (and know the safe limits of your battery)
All 18650 batteries have a “continuous discharge rating” in amps, do not draw more amps than
this from your battery! If you do you will damage the battery, reducing it’s life span but more
importantly you risk heating the battery up potentially causing it to go into thermal runaway and
venting. Different models of batteries have different ratings, be sure to get one appropriate to
what you’re using it for.
Know how to calculate your current
You need to know what current (how many amps) you will be drawing from your battery with a
given build to ensure you’re not drawing more current than the battery can safely provide. For
this you need a ohm reader or a regulated mod which accurately measures resistance. To
calculate your current do the following: current = voltage/resistance. So lets say you’ve got a
0.5ohm build on your RDA and you’re using a 4.2 Sony VTC4 18650, current = 4.2/0.5. That
would mean you will be drawing 8.4 amps, well within the 30amps a VTC4 battery can safely
Make sure you’re not shorting your battery
If your battery has a hard short you can quickly vent your battery. Check your builds on a
regulated mod if you’re unsure of them.
Do not over discharge your batteries
Only discharge your batteries down to 3.7 volts. Going lower than this will quickly shorten their
life span. You will notice a decrease in power when they get this low. Use multimeter to check
the voltage of your batteries.
Do not invert your battery/batteries
The body of your mechanical mod is the negative, this means if your battery wrap get nicked or
damaged the negative of the battery which touches it will make it less likely to short.
Only use batteries which have undamaged wraps
If the wrap of your battery is damaged it can come into contact with the mod can cause it to
short. Get someone who knows how to rewrap your battery or if in doubt throw it out and
Hybrid top caps
Some mechanical mods, such as the Noisy Cricket or Limitless mod have hybrid top cap
connections. This means the 510 connector from your RDA makes direct connection with the
battery. Using a mod like this there are additional precautions to take:
-Only use a RDA with a protruding positive pin. The positive pin of your RDA needs to
protrude further than the threads (the negative) on 510 connector. If you use something
with a floating pin, on which the positive doesn’t protrude, you can have a hard short.
-Remove the battery before changing or removing your RDA. If you don’t do this the
battery can short on the 510 connector, causing a hard short.
Above is the bare minimum of safety precautions you need to take when using a mechanical mod. We
strongly advise continuing to read and learn more about using mechanical mods before using one,
there’s lots of great information about them online. Stay safe and happy vaping!