New York Squid

[Egiman]

I have question, will the led light will have overheat problem if use too long ? and the battery is rechargeable right?

As long as you keep the light underwater it will stay cool. The battery is just a lead-acid deep cycle RV-type battery, similar to a car battery, only designed to discharge slowly rather than in a burst to crank an engine. Optimum brand are expensive, but they last well, and won't spill acid. You need to keep lead-acid batteries fully charged or they will die quickly..