Pila is not the best, it depends on what you are looking for in a charger. I came from building custom flashlights so I've been using li-ions for almost a decade. Pila was pretty much the first safe charger for home use, still is. But it does have it's limitations. Really depends on what you want to charge. For vaping IMR/Li-Mn is most common so it can be a good choice.
For 16340 li-ion & smaller it's not recommended but doesn't really aplly to the vaping world. For 18650s it's not that great IMO, will do the job but it will take hours to charge one at only 600ma. IMRs can be charged at much higher rates. The Pila also requires spacers for charging shorter cells.
I personally can't stand waiting around 8 hrs to charge my depleted 18650s, 25500s, 26500s, 26650s. I use a hobby charger to charge these where I can set the charge rate but it requires an external DC power source. Takes only less than 30 mins to charge a depleted IMR 18650-1600 at >4A. For all my 16340s (that I use in flashlights) I currently use a Nitecore i2. Just an inexpensive charger but for travel it can charge anything from my 16340s to 26650s without the need for spacers.
If you don't mind the few limitations, high cost, & want a good quality charger that will always terminate at the proper voltage, the Pila is a great choice. For as long as it has been around, I'm surprised they have not updated it & there are no other comparable high quality chargers. Guess too many people are just interested in low cost.
For my needs even before vaping I never considered purchasing a Pila & doubt I ever would. I don't expect my i2 to last long but for now it suits my needs.
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