Dual+ Spare Battery Brick 90WhSIPABOARDS DUAL+ BATTERY BRICK 90WH The Dual+ Battery system offers modular battery upgrades. The 90 Wh battery can be paired with another 90 Wh brick or the more powerful 180 Wh brick. The Dual+Battery system uses two separate bricks that combine the motors autonomy. The 90 Wh battery is cleared for air travel by IATA standards. All SipaBoards batteries use aerospace grade battery cells, ultrasonic welding and is encased in a special fire retardant