The TN25c features advanced combustion technology, including Electronic Combustion Assist and Passive Catalytic Technology, which work together to optimize airflow and combustion efficiency without the need for a manual bypass. By supplying backup power to the ECA system, this battery pack helps preserve the stove’s automated performance and consistent operation even when household power is interrupted. The battery box assembly attaches magnetically to the stove, allowing quick installation and easy access for battery replacement. You can still operate the wood stove manually if you don't use the battery backup.