Every standby generator requires a battery to start the system, and the ideal power source for the job is the Generac Wet Cell Battery. This hand tool offers the recommended 26R that can be used with all air-cooled standby products and liquid-cooled standby products 60 kW and below, excluding the QT4842. These generator accessories are just what you need to ensure that your system will power up every time. Each one weighs 70.1 and is a item that you can add to your current generator. It’s a very useful item to keep your home up and running during a power outage or other emergency. Generac 5819 26R Wet Cell Battery: Gender: unisex.