GYSFLASH 121.12 CNT FV Battery Charger
GYSFLASH 121.12 CNT FV Battery Charger
The GYSFLASH 121.12 CNT FV is a 120A high-power connected battery charger with inverter technology, designed for professional workshops, dealerships and exhibition centres. Fully USB-customisable and featuring Flexible Voltage (FV) operation between 85–265V, it delivers perfectly stable 12V output for Lead-Acid and Lithium Iron Phosphate (LFP) batteries across all stages of diagnostics, charging and showroom use — with up to 12 configurable charging profiles and advanced data logging via USB.
4 Operating Modes
- Charge — charges 12V Lead-Acid or Lithium (LFP) batteries from 5 to 1,500Ah with an 8-step curve (Lead) or 9-step autonomous curve (Lithium LFP)
- Diagnostic — supports 12V vehicle batteries during workshop diagnostic sessions, up to 120A
- Showroom — provides current compensation when using a demonstration vehicle’s electrical accessories, while managing optimal battery charging
- Tester — checks battery voltage and evaluates the starting system (starter and battery) and alternator condition
USB Connectivity & Advanced Functions
- 100% USB customisable — add, delete or modify charging modes and profiles via USB key
- Import configuration files — load predefined profiles perfectly adapted to specific charging applications
- Data logging — save charging history and data to a USB key, easily opened in a spreadsheet
- SMC (Smart Module Connector) — connect additional modules such as a printer or barcode reader
- Up to 12 charging profiles — including Easy mode for simplified charging of all Lead-Acid batteries
Key Features
- Flexible Voltage (FV) — operates on supply voltage from 85 to 265V for worldwide compatibility
- Auto-Detect — automatically starts the charging process when a battery is connected
- Auto-Restart — saves device memory and restarts automatically after a power failure
- SOS Recovery — recovers deeply discharged batteries above 2V automatically
- Lockable operation — prevents improper handling or misuse; ideal for workshops and showroom vehicles
- Cable inspection & calibration — ensures reliable operation across extended cable runs
- Low profile (13cm height) — fits underneath a vehicle for space-efficient workshop use
- Durable carry case — with shock and vibration absorbing pads
Ultra-Safe Protection
- Short circuit, reverse polarity and overcharge protection
- Spark prevention system
- Interchangeable fuse protecting against misuse
- Internal temperature sensor preventing electronics overheating
Technical Specifications
| Specification | Detail |
|---|---|
| Maximum Output Current | 120A |
| Battery Voltage | 12V |
| Battery Types | Lead-Acid (Gel, AGM, Liquid, Calcium), Lithium LFP |
| Battery Capacity Range | 5–1,500Ah |
| Charging Curve (Lead) | 8-step |
| Charging Curve (Lithium) | 9-step autonomous |
| Charging Profiles | Up to 12 (including Easy mode) |
| SOS Recovery | Batteries >2V |
| Supply Voltage (FV) | 85–265V AC |
| Connectivity | USB key, SMC module socket |
| Height | 13cm (low profile) |
| Supplied With | 5m cables, durable carry case |
Frequently Asked Questions
What does FV (Flexible Voltage) mean?
FV means the charger operates on any supply voltage between 85 and 265V AC, making it compatible with power supplies worldwide without any manual adjustment.
How do I customise charging profiles?
Profiles are managed via USB key — import predefined configuration files or build your own, then load them directly onto the charger. Up to 12 profiles can be stored simultaneously.
Can I save and review charging data?
Yes — the GYSFLASH 121.12 CNT FV logs charging history and data to a USB key, which can be opened directly in a spreadsheet for record-keeping or analysis.
What is the Tester mode?
Tester mode allows you to check battery voltage and evaluate the condition of the starting system (starter motor and battery) as well as the vehicle’s alternator, without requiring a separate diagnostic tool.
UK-Based Support & Genuine Warranty Protection
When you buy from Dunns Automotive, you’re buying from an authorised UK distributor. Every product comes with full UK warranty coverage and support from our UK-based team — no grey imports, no overseas delays.