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GYSFlash 121.12 CNT FV

The first step of performing proper diagnostics is providing a steady voltage to the electrical system of the vehicle. The GYSFlash 121.12 CNT FV supplies clean and stable power needed for maintaining the battery state-of-charge during flash/programming and complex maintenance/service procedures on modern automobiles. Also, the device can be used to recharge almost any type of batteries found on today's vehicles being these motorcycles, passenger cars, trucks, heavy duty trucks, etc.

Battery voltage maintainer for diagnostics and programming procedures.

Applications: Automotive, Heavy-duty Trucks, Agricultural & Construction machinery, Powersports, etc. 

The GYSFlash 121.12 CNT FV is a professional multi-functional charger designed to support and maintain a steady voltage during diagnostics or programming procedures. It also guarantees an ideal quality of recharge for almost all types of batteries installed on modern automobiles, including lithium batteries. This charger can be fitted with cables up to 8 m long. The software of the GYSFlash 121.12 CNT FV includes different modes to choose from:

  • Charging mode. The device is capable of charging lead-acid, sealed, liquid, AGM, or lithium batteries.

  • Diagnostic and Programming mode. The device provides a steady voltage required during diagnostic and programming procedures. This battery voltage maintainer can provide up to 120 Amp. to compensate and ensure successful analysis without damaging the battery.

  • Power and showroom mode: Maintains the charge of the battery and supplies the energy required during vehicle demonstration situations.

  • Tester mode. This function checks the state of the battery and tests the vehicle starting system and alternator.

  • Auto-Detect function. The GYSFlash is equipped with the "Auto-Detect" function which automatically starts a charge when a battery is connected to the charger. The "Auto-Restart" function offers the possibility of automatically restarting the charger in the event of a power failure.

  • Lock function. It is possible to "Lock" the buttons of the GYSFlash when it is used in a place open to the public or unattended.


The GYSFlash is SMART! The features mentioned above can be extended by adding specific charging modes and profiles using the USB port and custom settings. The GYSFlash also offers the possibility to record the charging data on a USB memory stick. This data can be used for detailed analysis. Additional modules such as a printer, bar-code reader, etc, can also be connected to the charger via its dedicated module socket. For detailed info visit the manufacturer's website HERE.


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