The best replacement for second battery is capacitor.

The best alternatives to second battery are rated as following:
★★★★★  capacitor
★  bigger alternator

Your alternative for second battery is not listed? Suggest!


No companions for second battery have been suggested so far.
You have in mind a companion for second battery and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of second battery in all years. Click on graph for more.
second battery
capacitor
bigger alternator