For all Yamaha external batteries, and 600wh intube batteries, as on Yamaha carbon fiber Allmtn models (2021 Allmtn 6 / 2021 Allmtn 7 / 2021 Allmtn SE / 2022 Allmtn CF6 / 2022 Allmtn CF12 )
This is used to charge the batteries on the Yamaha eBike systems. Often purchased as a spare to leave at work or to extend your range.