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GYSFLASH · Battery support units
Hold a 12 V battery at a steady voltage while you flash, code and calibrate, so a long session never drops a module. They plug into a standard 120 V outlet.
Made in France
Programming and coding run with the ignition on, often for half an hour or more. If the battery sags mid-flash, the update can stop halfway and leave a control unit dead. A battery support unit holds the voltage you set, whatever the car draws.
Flexible Voltage accepts anything from 85 to 265 V. Plug into a standard 120 V shop outlet for up to 100 A, or into 240 V for the full 120 A. No transformer, no rewiring.
Load the charging profiles your brand calls for, export every session's history to a spreadsheet, add a receipt printer, and install firmware updates from a USB stick.
Pick by how you work
The strongest unit on a 120 V outlet. At 13 cm (5.1 in) tall it slides under the car, so it follows the technician from bay to bay on a trolley.
The same 120 A power in an upright case that mounts on the wall or on the lift, with a cable reel on the front. One per bay, always plugged in, never on the floor.
The compact 50 A connected unit: lighter loads, motorcycles, a showroom or a second bay. Switches to 16 V and 24 V batteries too.
We confirm price and lead time within one business day
Datasheet (PDF)Side by side
| Feature | Our pick125.12 CNT FV | 123.12 CNT FV | 51.12 CNT FV | 121.12 CNT FV |
|---|---|---|---|---|
| Best for | Programming cart, rolls under the car | Wall or lift mount, fixed bay | Smaller shops, second bay, 16/24 V | Previous generation |
| On a 120 V outlet, continuous at 77 °F | 100 A | 100 A | 40 A | 75 A |
| On a 120 V outlet, at 104 °F | 77 A | 85 A | 27 A | 55 A |
| On a 240 V outlet, max | 120 A | 120 A | 50 A | 120 A |
| Batteries | 12 V lead & LFP | 12 V lead & lithium | 12 / 16 / 24 V lead & LFP | 12 V lead & LFP |
| Capacity | 20–1,500 Ah | 20–1,500 Ah | 10–600 Ah | 20–1,500 Ah |
| Cables | 5 m · 25 mm² | 5 m · 25 mm², front reel | 2.5 m · 10 mm² | 5 m · 25 mm² |
| Case | Low, 13 cm (5.1 in) | Upright, wall / lift | Low, 10.5 cm (4.1 in) | Low, 13 cm (5.1 in) |
| Weight | 13.9 lb | 14.1 lb | 10.1 lb | 13 lb |
| USB profiles, logs & printer socket | ✓ | ✓ | ✓ | ✓ |
| Price | $2,084.00Restocking | $2,485.00Restocking | On request | $1,895.00Last unit |
Output from the GYS datasheets, which rate the 120 V figures at 110 V; on a 120 V outlet you get at least as much. The GYSFLASH 100.12 HF runs on 220–240 V only and is left out of this page.
At full output the 125.12 and 123.12 draw up to 1,500 W from a 120 V outlet, about 12.5 A. That is comfortable on a dedicated 20 A circuit and tight on a 15 A outlet shared with a lift or a compressor. On 240 V they draw up to 2,000 W and deliver the full 120 A.
Complete the station
GYSFLASH TROLLEY XL - ND
Steel trolley for the 125.12, 123.12 and 121.12: big wheels, a cable tray and a laptop shelf at working height.
$902.00In stock
PRINTER MODULE
CNT-SPM receipt printer: plugs into the SMC socket and prints a battery report for the customer at the end of each session.
$569.00Restocking
Yes. Every unit on this page is Flexible Voltage and accepts 85 to 265 V. On 120 V the 125.12 and 123.12 hold 100 A continuously and the 51.12 holds 40 A. Plug into 240 V when you want the full rated output.
A charger follows a charge curve and tapers off as the battery fills. A battery support unit holds a fixed voltage and supplies whatever current the vehicle draws, up to its rating, so the electronics see a healthy battery for the whole session. GYSFLASH units do both: Charge, Diagnostic (support), Showroom and Tester modes.
A modern vehicle with the ignition on, fans running and modules awake can draw well over 50 A during programming. A 100 A-class unit (125.12 or 123.12) keeps headroom for long sessions on large vehicles. The 51.12 covers lighter loads, motorcycles, showroom cars and second bays.
Yes. They charge and support 12 V lithium-iron-phosphate (LFP) batteries with a dedicated 9-step curve, and lead batteries (AGM, EFB, calcium, gel and flooded) with an 8-step curve. They recover deeply discharged batteries from 2 V.
Yes. GYS publishes firmware for the connected GYSFLASH range; you download it for your serial number and install it from a USB stick. See Firmware & software updates.
Some carmakers publish approved equipment for programming; others publish a minimum specification. Tell us your brand and we'll confirm which GYSFLASH matches its requirement before you order.
We quote multi-unit orders with trolleys and wall mounts, and confirm lead times before you order. Purchase orders and tax-exempt accounts are welcome.