Hopefully they’ve sorted it but I found Lezyne lights good for around a year and then their long term battery was terrible. Its 9 years back now (so it probably has been sorted) but I’d often find I’d charge the lights for the commute, press the battery sensor which said it was good (green), but before I was home (35mins later) the rear light had switched off and given it was a rear I couldn’t really say where and when. The battery tester should only flash green when there’s several hours of battery left (not sub 35mins)! So I don’t think I’d trust Lezyne.
My varia RTL515 is good for about 3.5-4 hours now in peleton mode after 5 and gives me a couple of warnings well before it fails and I can see on the head unit when it does (when it does I can see on the head unit it has). When it was new, I‘d easily get the claimed 8hours. When that replaced it’ll be with another Garmin Varia, I cant decide though if I want the heavier 715 with shorter battery or the reliable 515.