What is the battery life cycle of this Electric Stair Climbing Hand Trucks?

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• What are the step height requirements for using a Electric Stair Climbing Hand Trucks?

  It could be used on the stair with a slope angle less than 35 degrees.

• What are the accessories of stair climbing machine?

  Package Include: 1* Electric Stair Climbing Dolly 1* Batteries Included 1* Charger 1* Accessories Bag 1* Safe Belt 2* Key 1* User Manual

• How to operate this Electric stair hand truck

  Please kindly check Operation interface: three keys, "up" on the left to go upstairs, "power" in the middle to start, and "down" on the right to go downstairs. Hold down the stairs and stop when you release your hand.

• Why my batter of the electric stairs climbing trucks can not be recharged?

  Please do the following troubleshooting methods: 1) Turn the key to turn on the machine 2) See if the battery light is on 3) Press the button to check the battery level. And if it still doesn't work , please kindly take a short video to us at ...

• Why the charger of the electric stairs climbing trucks cannot charge ?

  Please do the following troubleshooting methods: 1) The charger does not light up: not connected to the power supply. Please confirm that the power cord is connected 2) The battery does not light up: Please press the battery button and see if the ...