My headlight is wrenched on with hose clamps, so I don't bother to take it off in the summer, but over the last few months I've turned it on only maybe 2-3 times, and haven't charged the battery. Once we leave daylight savings I'll be riding in the dark every morning and I'll swap&recharge my 18650 headlight battery approx. weekly (I have two batteries, light takes one, batteries take turns each week being used vs backup)


I use my red blinky (cygolite hotshot) full time, and pop it on the usb to recharge maybe monthly? I don't even know how often, and can't tell a difference from recharging it, just sometimes I think 'it's been quite a while, this thing must need recharging by now'.