Umm, I think I moved on from speedlights to Godox AD200 / AD600 battery powered strobes around 2016, but sometimes when I was in a studio, I might have been using the studio's Alien Bees and Einsteins from Paul C. Buff's line of strobes. Luckily the batteries from that time frame were better built than the newer ones that were used for the Godox Pro version of their ADx00Pro battery powered strobes.
Been a long time since I mess with speedlites, and it's usually once a year at Heroes Con when I covered their art auction, with a speedlite on my hotshoe (but it's been 3 years since I attended that convention, and I have no idea if my cheap speedlite even works any more nowadays).