Can I run a 10.8 volt radio on 12 volts?

[hotrod]

at walmart and/or radio radioshack they used to sell a cigerette lighter plug that had a variable
voltage switch on it and u set it to the voltage you needed.it went up by 2-3 volts at a time
so ya sometimes had to use 1 less volt but no biggie.plus they had alot of rca jacks to plug into
ya radio on other end these are really neat