BOB, The Brown-Out Booster
To save fuel, some newer cars automatically switch off the engine instead of idling. As they restart, power to accessories momentarily drops below V1's 10-volt minimum, causing it to repeat its start-up sequence when voltage is resumed. BOB (optional) solves the problem by maintaining voltage during these brief sags. BOB has two RJ11 (telephone) jacks. Run a power cord from the source of 12V to the jack labeled "To 12V." Plug power cord from V1 into the jack labeled "To V1."
BOB is an electronic device that doesn't use a battery and requires no periodic service.
Install according to one of the following diagrams: