![Amazon.com: 1-2-Both-Off Battery Disconnect Switch, 12V 24V 48V Battery Selector Master Cutoff Switch for Marine Boat Car RV ATV UTV Vehicle, Waterproof Heavy Duty Battery Isolator Switch, 200/1250Amps : Automotive Amazon.com: 1-2-Both-Off Battery Disconnect Switch, 12V 24V 48V Battery Selector Master Cutoff Switch for Marine Boat Car RV ATV UTV Vehicle, Waterproof Heavy Duty Battery Isolator Switch, 200/1250Amps : Automotive](https://m.media-amazon.com/images/I/61tMuMnXJUL._AC_UF350,350_QL80_.jpg)
Amazon.com: 1-2-Both-Off Battery Disconnect Switch, 12V 24V 48V Battery Selector Master Cutoff Switch for Marine Boat Car RV ATV UTV Vehicle, Waterproof Heavy Duty Battery Isolator Switch, 200/1250Amps : Automotive
![electrical - 3 way switch lighting 2 bulbs with independent on/off option - Home Improvement Stack Exchange electrical - 3 way switch lighting 2 bulbs with independent on/off option - Home Improvement Stack Exchange](https://i.stack.imgur.com/ppe56.png)
electrical - 3 way switch lighting 2 bulbs with independent on/off option - Home Improvement Stack Exchange
On a 3 way switch, usually both switches are in the same position in order for the light to cut on. Either Up, Up or Down, Down but I have seen them
![Battery Selector Switch (1-2-Both-Off) | Marine Toggle Switch Panels, Fuses, Circuit Breakers Manufacturer | YIS Marine Battery Selector Switch (1-2-Both-Off) | Marine Toggle Switch Panels, Fuses, Circuit Breakers Manufacturer | YIS Marine](https://www.yismarine.com/Templates/pic/BF442_I.jpg)
Battery Selector Switch (1-2-Both-Off) | Marine Toggle Switch Panels, Fuses, Circuit Breakers Manufacturer | YIS Marine
![electrical - Why is this double switch controlling both light circuits from both switches? - Home Improvement Stack Exchange electrical - Why is this double switch controlling both light circuits from both switches? - Home Improvement Stack Exchange](https://i.stack.imgur.com/XvzdE.png)