• To stop the vehicle, always turn off the vehicle's speed controller first and then disconnect the drive battery comple-
tely from the speed controller.
Only now may the transmitter be turned off.
• The transmitter's coverage decreases in case of weak batteries (or rechargeable batteries). Replace the batteries
or rechargeable batteries with new ones.
If the vehicle drive battery is weak, the vehicle becomes slow or it does not respond correctly to the transmitter.
The vehicle drive battery is not only for powering the motor via the speed controller, but the speed controller
also generates the voltage/current necessary for operating the receiver and steering servo.
For this purpose, a BEC („battery eliminator circuit", electronic switching for the direct power supply of the
receiver, without any additional receiver battery) is integrated in the speed controller.
When the drive battery's voltage is too low, the receiver's voltage drops as well with the result that the
vehicle will not respond to the transmitter control commands.
In this case, stop driving immediately (turn off the speed controller, disconnect the drive battery from the vehicle, turn
off the transmitter). Then replace the vehicle's drive battery or recharge the drive battery.
• Both, motor and drive, as well as the speed controller and the vehicle drive battery heat up during operation. Before
each battery change, take a break of at least 5 - 10 minutes.
Before a charging process, let the drive battery cool off completely.
Do not touch the motor, speed controller and battery until they have cooled off. Danger of burns!
• If you operate the vehicle with a LiPo drive battery, the undervoltage detection must be turned on (we recommend
3.0 V/cell or higher).
When the undervoltage detection is turned off, it comes to a deep discharge of the LiPo battery, which will destroy
it. Loss of guarantee/warranty!
When using a NiMH drive battery, the undervoltage detection should be turned off, to make better use of the capa-
city of the NiMH battery. Stop this operation here when the vehicle becomes slow. Alternatively, the undervoltage
detection can be set to a lower value as that used for the LiPo battery. Please refer to the Chapter 10. b).
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