GYS Battery Chargers & Boosters

Battery charging and maintenance equipment by GYS — smart chargers, boosters, testers and accessories for workshops, dealerships and showrooms.

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About the range

GYS battery charging and vehicle power support

A modern vehicle cannot be diagnosed, programmed or handed over on a flat battery. GYS builds the chargers that dealerships and workshops use to hold voltage steady while the electronics are awake — the GYSFLASH range — alongside boosters for starting and capacitor units for battery-free support.

Manufactured in France since 1964. Stocked and supported in the United States by GYSUSA.

  • Workshop & showroom

    GYSFLASH smart chargers

    Inverter chargers that charge, maintain and act as a stable power supply during diagnostics and module programming. Showroom mode holds a vehicle ready for months without cooking the battery.

    Chargers
  • Starting

    Boosters & capacitor units

    STARTRONIC boosters for conventional jump starting, and GYSCAP batteryless capacitor units that charge in seconds and start a vehicle without a lead-acid pack to maintain — ideal for a busy workshop or a used-car lot.

    Boosters
  • Support

    Cables & accessories

    Replacement cables and clamps, wall mounts, trolleys and anti-surge protection to keep a charger safe on a vehicle with sensitive electronics.

    Accessories

Why voltage support is not optional any more

Module programming, ADAS calibration and long diagnostic sessions all keep the vehicle's electronics powered for far longer than the battery was designed to carry alone. If voltage sags mid-flash, you can corrupt a module — an expensive way to learn the lesson.

A stable power supply holds the system at a set voltage regardless of load, which is why most manufacturers now require one for software work rather than merely recommending it.

Choosing the right unit

Match the charger to the job: light maintenance on a few cars, or continuous support across a workshop and showroom. Amperage, the number of outputs and the cable length all matter more than headline price.

Tell us how many bays you run and what work you do, and we will point you at the right one — (415) 419-5824.

GYS Battery Charging Catalog

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Flip through the full official catalog — GYSFLASH smart chargers, STARTRONIC boosters, GYSCAP capacitor units and every cable and accessory, with full specifications.

  • Since 1964 Family-owned French manufacturer of welding, charging and repair systems.
  • Workshop grade Showroom and diagnostic charging trusted by dealer networks.
  • US-based support Technical help, parts and consumables from our US team — (415) 419-5824.
  • Fast US shipping Equipment and accessories shipped from California.