Using Ohm’s law, described briefly below, running a device at 4.0V with a 1.8 ohm coil will draw approximately 1.6 amps from the battery. This is far below the 2.65.2 amp rating of your average 2600mAh ICR18650 battery. You would have to confirm the maximum current draw of your ICR18350 battery though.
NCR NCR batteries are a new type of battery manufactured by Panasonic. NCR batteries use a Cobalt cathode like ICR batteries but have the same hybrid makeup with nickel which IMR batteries have. This provides for higher drain capabilities while also having higher overall battery capacity.
NCR batteries also have a feature called HRL or Heat Resistant Layer. HRL is an extra layer of material around the cathode that prevents the battery from overheating even during internal short conditions. This makes it one of the safest batteries on the market but you lose 20 to 30% of the battery capacity due to general voltage range limitations mentioned previously.
Protected vs. Unprotected
There is a common misnomer in the community that a protected battery is safer to use than an unprotected battery. There is a belief that a protected battery will prevent you from over drawing your battery and causing it to explode or outgas. I’m not certain where this belief has started, but it needs clarification. A battery labeled as “protected” does not always prevent you from applying a higher current draw than it’s capable of handling. The protetion circuits in batteries vary from manufacturer to manufacturer but primarily prevent you from over discharging (using the battery past it’s minimum charge rating) or over charging the battery. The “protection” moniker is not all inclusive either. Some will provide just over discharge protection, others have over charge protection, and in some batteries, over current protection. You will have to hunt down the datasheet from the battery manufacturer to find exactly which protections are provided or hope that your merchant
The downfall of NCR batteries for ecigarettes comes from how their capacity rating is calculated. NCR batteries are capable of a much lower minimum discharge voltage before causing physical damage to the battery. The battery is capable of being discharged to 2.5V whereas IMR/ICR batteries have a cutoff around 3.6V. Considering most devices, including inline devices like the Evolv Kick, have builtin over discharge features which cutoff around 3.23.6V, y ??????????????????????????????????????????????9
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