Dual+ Spare Battery Brick 90WhThe 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 180Wh battery will provide up to 105 minutes (<1,5h) of motor operation.Charging time: 1 hourThe 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 housing.The 180Wh battery will provide up to 105 minutes (<1,5h) of motor operation.Charging time: 1 hour