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HS4
The machine starts but after a few meters it stops
Do a voltage test on the moving machine
1
Recharge your batteries
First, fully charge the batteries.

2
Run a voltage test
Connect the multimeter to the stopped machine and record the voltage while the machine is stopped. Then activate the controls and record the voltage while the machine is moving. If the voltage drop exceeds 1 or 2 V, it means the batteries are at the end of their life and need to be replaced.
NB: When replacing the batteries, replace all of them.

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