To Use Your Link....
What is the difference if any between the different battery chemistries?
Lithium Ion (Li Ion) requires a protection circuit for safety, whilst Lithium Iron Phosphate (LifePo4) and Lithium Manganese (LiMn or IMR) use safe chemistry. Although these batteries utilize safer chemistry, protection circuits are generally recommended. The safer chemistry will prevent venting with flames in the event of a catastrophic failure, whilst LI Ion batteries contain and oxidizer, which produces its own oxygen to support combustion, should sufficient heat be available at the source. Lithium-ion safety concerns
Furthermore, the LiMn or IMR battery is capable of handling greater load demands than their cousins the Li Ion and LifePOs (in a much smaller package), and hence is commonly referred to as a “high drain” battery. Providing the battery has the appropriate C rating for the application, these are the recommended batteries intended for use with low resistance atomizers.
Notwithstanding, larger cell Li Ion batteries are indeed capable of meeting large load demands. In these instances, battery longevity between recharges becomes the deciding factor between the two. e.g. The AW 18650 2600mAh battery will outlast the IMR 18650 1600mAh battery:
IMR18650 1600mAh 10C :
(1.6*10) = 16A for 6min; whilst
AW 18650 2600mAh 2C
(2.6*2) = 5.2A for 30 min
When using a factor of 3 against the IMR, (16A/3) = 5.3A in can readily be seen that decreasing its load demand will not increase its longevity significantly (6min *3) or 18 minutes, when compared to a similar load handled by the standard 18650 for 30 minutes. This data backs up speculation that IMRs are effective in all cells, where it can be clearly seen here and, as experienced by the community that IMR chemistry is wasted in larger cells. When using the mathematical equations, greater battery longevity is achieved using a standard 18650 over the IMR battery. In addition, IMR cells are unprotected. Although IMR cells use safer chemistry, the use of protected batteries should always be the deciding factor in which battery to use when, the increase workload capacity is of inconsequential value. [emphais added]
So, correct me if I'm wrong, but it seems that IMR's SHOULD be used for 14500's but is IRRELEVANT for 18650s?