What to do with that 3 AAA holder from your Magnum mod? Clip one pole, drill a hole, solder in a 401 connector, wire in a switch, use a 10440 for direct 3.7, with one battery slot open for a cart or really small juice bottle.
The whole thing is recycled. 3AAA holder from a LED flashlight, switch from an old computer mouse (rated 3A, 125V, IIRC), connector from a dead 401 battery, wire scavenged from same, 10440 battery from joye stick, epoxy as needed. Works surprisingly well and I really like it with an 808 cartomizer adapter, other than the airflow is really open with nothing sealing the back of the battery connector. Amusingly, a cartomizer with the caps on fits very nicely in that third bay. The switch has a nice click and is a bit recessed from the edge so it's unlikely to accidentally be hit, but I try to remember to take the atty off for pocket transport anyway. Makes a great backup.
The whole thing is recycled. 3AAA holder from a LED flashlight, switch from an old computer mouse (rated 3A, 125V, IIRC), connector from a dead 401 battery, wire scavenged from same, 10440 battery from joye stick, epoxy as needed. Works surprisingly well and I really like it with an 808 cartomizer adapter, other than the airflow is really open with nothing sealing the back of the battery connector. Amusingly, a cartomizer with the caps on fits very nicely in that third bay. The switch has a nice click and is a bit recessed from the edge so it's unlikely to accidentally be hit, but I try to remember to take the atty off for pocket transport anyway. Makes a great backup.