Colossal Cranking Power
The JS3000 is built for the “worst-case scenario.” When a large V8 diesel engine is stone-cold in the middle of winter, the internal resistance is massive; the JS3000’s 3000A peak delivery is specifically designed to overcome that initial inertia. It replaces bulky lead-acid booster packs with a lightweight lithium-polymer core that holds its charge for months and performs in extreme temperatures as low as $-20°C$.
Key Technical Pillars & Features:
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Professional Engine Capacity: Specifically rated for the largest consumer and commercial 12V engines, including 9.0L Petrol and 7.0L Diesel (covering almost all heavy-duty pickups, tractors, and small plant machinery).
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24,000mAh Multi-Device Hub: This isn’t just a car tool. With Bi-directional PD45W USB-C charging, you can power up a MacBook, tablet, or smartphone at full speed, making it an essential backup for remote work or camping.
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The “Boost” Override: For batteries that are effectively at 0V—which most smart chargers would reject—the manual Boost button bypasses all checks to deliver a raw 30-second surge of power to force the engine to crank.
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Innovative Stop Spark™ Technology: Topdon’s proprietary safety sensors prevent the unit from overheating by automatically suspending use after too many consecutive jumps within 10 minutes, protecting both the tool’s internal cells and your vehicle’s alternator.
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400-Lumen LED Command: Significantly brighter than its smaller siblings, the integrated light features Steady, SOS, and Strobe modes, providing enough illumination to work on a large engine bay or signal for help from long distances.
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Ruggedized Construction: The unit is housed in a high-impact, wear-resistant shell with premium copper clamps and heavy-gauge wiring to minimize energy loss during high-amp transfers.
Technical Specifications
| Feature | Details |
| Peak Current | 3000A |
| Battery Capacity | 24,000mAh / 88.8Wh |
| Engine Compatibility | Up to 9.0L Gas / 7.0L Diesel |
| Input / Output (Type-C) | PD45W (5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/2.25A) |
| USB Outputs | USB1: QC18W (12V/1.5A) / USB2: 5V/2A |
| DC Output | Max 16.8V / 10A |
| Jump Starts / Charge | Up to 45 |
| Flashlight | 400 Lumens (3 Modes) |
| Protection Rating | IP64 (Dust & Water Resistant) |




