Some of you guys that like to hack stuff and have an electronics background probably have quite a few rechargeable batteries of varying chemistry and size in their arsenal. I have been using an R/C charger with different homemade charging bays and connectors, from simple single to balanced parallel sleds for mods that use 2 cells in parallel. I can also balance charge up to a 4 cell pack I use in geotech monitoring equipment that has been retrofitted with Lithiums over NiCads. I can also charge SLA batteries with the same charger. Best part about using these chargers is that at a simple glance you can check state, functionality, charge time, and set failsafes like total current delivery. You could also add thermal monitoring. It took a while for the vaping/flashlight community chargers to catch up with the tech used in R/C stuph, but after 3 years of using an xcharger and no incidents I have been happy happy happy.
Just putting it out there for others looking for alternatives and looking to reduce the number of chargers they need on their bench. You can also use the charger for cordless power tool packs.