Every once in awhile, you may often find yourself behind the wheel with a dead battery. However, most completely dead batteries cannot be jump started by using your Boost’s default mode. Nonetheless, you can increase your range of jump starting with the Manual Override function. NOCO Genius Boosts are designed to jump start 12-volt lead-acid batteries down to 2-volts. By using the Manual Override feature, this will allow you to force “On” the jump start function for a weak battery. Be warned, both the spark proof and reverse polarity protection features are disabled in Manual Override mode.