Yep. Without a bridge, the second battery is not in the circuit, at all. Just a single 18650, with a spare battery, onboard. 
Not dangerous, just not in the circuit. Just don't put anything in there to act as a bridge. You could create a dead short.
The bridge must contact the positive of both batteries, while being insulated from the body of the mod.
I will make one, and send it to you. It's best to just remove the second battery, until you get the correct part from me.
I'll send you a message, shortly.
Not dangerous, just not in the circuit. Just don't put anything in there to act as a bridge. You could create a dead short.
The bridge must contact the positive of both batteries, while being insulated from the body of the mod.
I will make one, and send it to you. It's best to just remove the second battery, until you get the correct part from me.
I'll send you a message, shortly.