The Under-Seat Battery Holder is engineered for riders who demand peak performance from their E-trike. Steintrikes’ philosophy focuses on handling; by moving the battery from the rear rack to the space beneath the seat, the "pendulum effect" in corners is entirely eliminated. Can be mounted on the left side, right side, or both sides for dual-battery setups, effectively doubling the range for long-distance expeditions.

The holder is a robust metal bracket that supports the weight of modern high-capacity batteries. The FAT variant is particularly important for off-roaders; it is offset to provide extra clearance for the wide swingarms and massive tires typical of FAT models, while still keeping the battery tucked safely away from the rider's heels and the ground.