There is always that "BUT..." or "IF..." factor when discussing the truth. (sarcasm) I do agree, as long as you know the measured resistance of your atomizer and know the real amp limit of your battery and stay within its safe operating range, vaping on a mech can be reasonably safe. Problem is, too few salesmen teach this and too few consumers learn this on their own.People are afraid of using mechs because we've scared them into thinking you have to be a 'ohm's law master' or something. The truth is that as long as you don't build too low, you use good batteries and know the resistance range you're seeking, they're very safe.
Having worked for a midwestern vape shop francise as a sales associate for a year and observed both niave sales staff and niave consumers, those truths are not universally known by either consumers or sales staff. I don't know what the "answers" are to correct that.
Another problem is, accidents happen no matter how safe we claim to be. One memorable incident happened to me a couple of years ago. Out of the blue, the vape on my 0.6 ohm atty/mech became extremely harsh. I stopped vaping it immediately and began diagnostic steps. Measuring the resistance, it was now reading 0.1 ohm -- a 0.5 ohm drop in resistance (one of the post screws had become loose). Had I not made my build with reasonable safe headroom, I likely would have had a hard short and vented the battery.
How many mech users have adequate venting in their mechanical tube "just in case" a battery would vent. I would venture to say only 20% do. Mech Mods with top venting holes?
Time permitting, staff would make coils for clients in the shop. We had an inhouse rule to not build coils less than 1.0 ohm for clients for liability reasons -- a wise idea, but if new clients wanted to build their own subohm coils we could observe and advise during construction (unwise?).
We had several master coil builders making exotic coils for their personal use, but most of them ignored battery continuous discharge rates and used off brand batteries. The store even had protected ICR batteries in the battery display case (against my verbal protests), and my store manager almost sold one of these batteries to a new mech user wanting to sub-ohm before I pulled her aside. Luckily, most staff considered me the store's battery expert and consulted me frequently, but there were many times that I wasn't present because I was a part time employee.
I recall a particular guy I didn't recognize sampling flavors at the juice bar. I had the time, so I struck up a conversation. I didn't recognize his setup, so I asked to see it. He didn't know the resistance of his RDA (he didn't own an ohm meter), so I measured it -- 0.1 ohm. I checked the battery -- I recognized it as a Samsung 26F (a 4 amp protected ICR battery). The mech didn't have a lock for the fire button and had no vent holes. Needless to say I educated this chap that he was lucky to still have all of his fingers and face and why. I had him buy a recommended battery and told him to get a new coil with an acceptable resistance and buy an ohm meter.
I would often tell my customers to visit ECF. I would also try to educate my customers in store, but management often put limits on how much time we could be with individual clients in order to attend to the next customer. To their credit, management did hold educational lectures (with free pizza and pop) for topics like coil building and battery safety about once a month.
And yes, I was paid minimum wage on a part time schedule. A majority of the sales staff were pretty young women who had just begun vaping. Most made an attempt to learn what needed to be known but that takes time and most didn't last more than 6 months.
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