When I turn on old, one mode Fenix E05 it becomes dim, then I have to slightly loosen it for full brightness (it shouldn't work like that). Maybe pressure on the board caused it to bend and break a connection. I could try to add some solder to the copper that touches the battery but I'd like to take out the board and look in the back and maybe use a heat gun to melt everything and hope that fixes any broken connections. Could the head of the light (shown in photo) be further unscrewed or is it glued together? I don't have a microwave oven (I heard nuking electronics sometimes fixes them).