Agree. However, since my little solar panel experiment I’ve been a lot less worried about maintaining charge in little things because now I know they can all be charged off-grid.

That said, besides the backpack-able solar panels, I needed a few power banks for the experiment’s test and they (one Anker PowerCore 20,000 mAh and two 10,000 mAh) are now included in various kits. A Goal Zero Yeti 400 is for use at home, it makes for a nice power back-up for small gear. I charged the Anker power banks last week, the GZ is plugged in now. The Yeti 400 takes forever to take a full charge, but I’m not sure it’s healthy to push power banks and back-ups to 100%; I’m happy to get them to ~90%.

Charging AA and AAA NiMH batteries is a continuing process, no set schedule, but the way I use those lights, the batteries last a long time.