There is a lot of confusion surrounding batteries. For example, I'm sure it's bad, but I never let my 18650's go below 3.9V, so they never get a full discharge cycle. I have tried in the past to study up on what best practices are, but between conflicting info, and just plain wrong info found in various locations, I just gave up. If I have to buy a new ~$8 18650 every few months, so be it.
Generally, with the size batteries we use for vaping, any less-than-ideal battery practices will have a negligible effect on the overall lifespan of your battery. I honed my practices back when giant li-ions were the standard for power wheelchairs (we're slowly moving away from those now), and ideal battery maintenance meant the difference between getting six months out of your power chair's batteries and having to ship the whole 300lb monster back to the manufacturer (local guys won't touch *any* component on the chair if it's under manufacturer warranty) vs. getting a year and a half out of it and being able to call the local guys... and it also meant the difference between being able to nurse your dying chair home, or having it die unceremoniously on the sidewalk.
(edited to add): By "less than ideal" I'm referring to the present discussion re: the nitty gritty of how and when and how much to charge... which is not the same as *bad* battery practices, like charging naked li-ions unattended or the like. Obviously, being *careless* with li-ions is dangerous... but not being sure exactly how much to charge them or exactly when is the best time is not likely to have an *appreciable* effect on your overall battery lifespan, given the relatively small size of the batteries we're talking about. Probably an unnecessary clarification for this thread, but there it is anyway.
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