safety features are built into all the GG stuff, the fuse which would be purely overdischarge protection, is an add on. i'm not sure what the fuse rating is, but the springs will collapse beforehand based on current temps (standard), there's clearance on the top and bottom for venting (standard) and the end caps are well ventilated for outgassing (standard). additionally there are locks on the buttons when users choose to use them, easy circuit disconnect points on the body just turn counter-clockwise, etc., etc. really it's among the best all mechanical devices with user safety in mind (standard). the fuse is cool, it's overlapping protection, but by and large the factors that would make that the safety measure to make you "safe" are already addressed elsewhere in the standard design. with that in mind, the end user could and should conduct additional safe practices when using the device, any device, and batteries, chargers, etc....that should all be standard, but it isn't.