weBoost Support - April 23, 2018 17:07 Can I use a weBoost cellular signal booster in a car or boat that has 12v DC power? Print Absolutely. weBoost vehicle signal boosters that require 6v DC power ship with a power supply that will convert 12v DC to 6v DC. Every weBoost signal booster includes a power supply that provides the correct voltage for its designed application. Related articles Can I wire a booster's 12v DC power connection directly into my vehicle’s electrical system? Where can I download my booster's install guides? Which mobile booster is better? I have a home / building cell signal booster and some or all lights are red. What do I do? Can I leave the signal booster in my vehicle on all the time?