No Internal Battery. No Waiting. Just Reliable Starts—Anywhere.

A booster, also known as a jump starter, is a tool designed to help you start a vehicle when the battery is dead or too weak to crank the engine. Traditional boosters use built-in lithium or lead-acid batteries that need to be charged in advance and maintained regularly. But the GYS STARTRONIC 800 changes the game with super capacitor technology—delivering instant power without the need for internal batteries or constant charging.

Unlike conventional units, the STARTRONIC 800 charges itself in seconds using the tiny residual voltage from the dead battery it’s connected to—or from a nearby vehicle, cigarette lighter socket, or USB port. Once charged, it delivers 800 amps of powerful current to jump-start most 12V gasoline or diesel engines (up to 90Ah) safely and reliably.

Why Choose a Capacitor-Based Booster?

• Always Ready: No internal battery means no charging between uses, no degradation over time, and no maintenance.

• Instant Recharge: Pulls energy from a weak battery or other sources and becomes ready to start within 60 seconds to 4 minutes.

• Safe & Smart: Reverse polarity protection, short-circuit protection, and deep-discharge safeguards are built in.

• Ultra Durable: Can be used over 10,000 times without performance loss—ideal for emergency kits, professional garages, and fleet use.

• Extreme Temperature Ready: Works flawlessly from -40°F to +149°F.

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Key Features:

• 800 A Start / 1400 A Peak

• Bypass Mode – Starts completely flat batteries

• Glow Mode – Pre-heats diesel engines in cold weather

• Compact & Lightweight – Weighs only 4 lbs, stores easily in any trunk

• Charging Methods:

  • From discharged vehicle battery: ~2 minutes

  • From running engine: ~60 seconds

  • From 12V outlet: ~4 minutes

  • From USB: ~40 minutes