How Frequent To Change Car Battery. Under normal circumstances, starting your car will drain the battery a little, but the alternator will charge it back up as you drive. The reason for this difference is that the smart key fob also has a receiver and has to communicate with the car more often when it's inside or near the car.
You should try an automatic trickle or float charger. In most cars, a key fob battery is not. Like new batteries, the key to making it last is to recharge it regularly.
Start the vehicle with the working battery.
Attempt to start the car with the dead battery. In that same way, any power that your car’s accessories use while you are driving should be supplied by the alternator, so the battery never “cycles” deeper than it. If the vehicle is originally supplied with an efb battery, an efb battery can also be used as a replacement. Upon losing the first bar, we estimated that a 30kwh nissan leaf would deliver an average range around 110 miles per full charge, down from 130 miles with the full 12 bars.