Not sure about the light having low voltage protection. I would think the charger has built in over charge protection but I’m not sure. Btw,I’m in the USA. Have the shipping laws changed since I bought batteries? Last I heard, batteries were no longer going to be shipped without being sold with a charger, flashlight or something to that effect. Just wondering since I see most people not recommending buying batteries overseas. Or is it because there are lots of fake batteries out there now?