i just came back from a ride . first time that the batteries went low to the point i didn't have turbo mode anymore. So when i arrived home i took the lights out of the bike and tried to turn them off. and i notice i have a difficulty to do so . the Button in the rear seems like is not flat any more. it's round like it has air in it.
then i look at the other light , SAME thing. When i opened the light i heard gas/air release .
i'm using NiMa energizers. is it possible the batteries released some gas ? very weird.