Which batteries are best depends on what you want to use them for.
IMR batteries are (slightly) less likely to go into thermal runaway than normal Li-Ion ICR batteries and are known as ‘safer chemistry’
Some people get as far as reading ‘safe … and then stop. You can still get them to go bang if you don’t treat them well. They are safer
The chemistry used in IMR cells means they handle higher current drain better, but and this is a big BUT. If you exceed the design limits then you are running a risk of the battery venting and bad things happening.
If all you want to do is use a mech mod with a standard (1.5ohm or higher) resistance coil on it then a protected ICR cell is better than an IMR cell.
The reason is that IMRs work better at higher current draws so if you use a lower current draw then it’ll go flat faster than an equivalent sized ICR. This means you have to recharge it more often, and the life of a battery is limited by how many times you charge it up. Every time you charge it it dies a little bit. Over time all these little bits add up and sooner or later you have a battery that doesn’t holda charge for more than 5 minutes which is no use to anyone.
If you want to use your mech mod for higher current draw stuff (low resistance, less than 1.5ohm coils) then IMR are better as now they last longer than the equivalent ICR batteries.
If you want to get into ‘sport vaping’ and be able to activate smoke detectors at 50 paces, then be careful find out what the amp limit on the battery you want to use is. Then check using an ohms law calculator exactly how much current your build is going to draw. If what you need is lower than the amp limit on the battery then go nuts. If it’s higher you need to invest in better batteries.
The really high current batteries are specialist batteries and as such cost a lot more than a standard IMR but you need them if you don’t want to run into problems running crazy low sub-ohm setups.
If you are going for low resistance builds with IMR batteries then you NEED some kind of fuse in there. Either a 2c for safety type of fuse or a hot spring will do fine.
You absolutely positively don’t want a venting battery anywhere near your face. Ever.
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