Got it. I will stick with my Panasonics for now. My main confusion was between the red and black ones and now that you have clarified that, I see really not a whole lot of difference between the red ones and the Panasonic ones.
And like you said, will wait for Faceless to chime in as well...
There really is no such thing as a protected battery, by the time the battery gets to the point of failure and the protection circuit would kick in, the batt is too far gone to stop the reaction that is occurring internally. The AW IMR are not protected but are the safest because they don't explode when shorting out or failing, the get dam hot and will melt due to the heat but do not out gas like others. BTW the AW batt is make by Panasonic I believe but they are not labeled as such. I only use AW IMR, not AW or AW protected but AW IMR. They are the best for every need in which I require a battery in my vaping. If you have a Zen headed your way and you would like to keep your life time warranty then I would suggest picking up some AW IMR batts and using anything else will leave you without that badazz warranty. Plus the batts are cheap and not using what is recommended or warned that you should use, just seems a bit ridiculous to me. Spend a bunch of money for a device and then cheap out on a $11 item. I see the similar with people in my motorcycle chapter, buy an $20K bike and although the manufacturer tells you to run 93 octane or your engine will ping and cause excessive wear and yet they still pump in the 87 octane chit, then ditch and moan when they start having engine issues after only 50K miles and others are on 200K miles with no engine issues.

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