GOLDFOREST 4000A Portable Car Battery Jump Starter with Air Compressor

About This

• [8-IN-1 PORTABLE EMERGENCY STATION] More than a basic jump starter: integrates battery booster, 150PSI tire inflator, digital pressure gauge, 20000mAh power bank, 400-lumen LED flashlight with SOS/Strobe modes. Type-C input for fast recharging, USB-A output for charging phones and tablets on the go
• [4000A PEAK - START COMPLETELY DEAD BATTERIES] Instantly revives drained 12V vehicles up to 10.0L gas or 8.0L diesel engines, even at extreme temperatures from -4°F to 140°F. Force Start mode jumpstarts zero-voltage batteries that other starters cannot. Up to 70 starts per charge, 1500+ recharge cycles
• [SMART 150PSI TURBO AIR COMPRESSOR] Turbocharged 30L/min motor inflates flat car tires (0-36 PSI) in under 5 minutes. Set-and-forget technology: auto shut-off at your preset pressure prevents over-inflation. 5 preset modes, 4 pressure units (PSI/BAR/KPA/kg/cm2), 4 nozzles included
• [SUNLIGHT-READABLE LCD DIAGNOSTIC DISPLAY] Large high-contrast screen remains clearly visible in direct sunlight, showing real-time battery percentage, tire pressure readings, charging status, and error alerts. No guesswork: always know exactly when your device is ready for emergencies
• [10-LAYER SAFETY WITH V0 FIREPROOF BATTERY] Smart jumper clamps feature spark-proof technology, reverse polarity alarm with loud beep and red light warning, overcurrent, short circuit, and temperature protection. Premium lithium cells meet V0 fire resistance rating for maximum safety
• [ESSENTIAL CARE TIPS - PLEASE READ] (1) Fully charge before first use. (2) Recharge every 2-3 months during storage - lithium batteries self-discharge 3-5% monthly and deep discharge causes permanent damage. (3) Jump start when battery shows 75%+. (4) Allow 5-min cooldown after 10 min of continuous inflation

Overview

• Brand : Goldforest
• Battery Cell Composition : Lithium Polymer
• Voltage : 12 volts
• Vehicle Service Type : Motorcycle, Passenger Car, Truck, Van
• Battery Capacity : 20000 milliamp_hours
• GOLDFOREST creates precision-crafted auto gear—from jump starters to dash cams—designed for safer, smarter, and smoother driving.
• We’re a passionate team focused on building smarter, safer car accessories you can count on—wherever the road takes you.
• Our promise is simple
• Premium Quality – Thoughtfully built to perform and last.
• You First – Questions or concerns? We're here to help, always.
• How many tires can this jumper box with air pump inflate on a full charge?
• It can inflate up to 8 car tires from flat to 36 PSI on a full charge. For continuous use, allow at least 1 minute between inflations to prevent overheating and auto-shutdown.
• What vehicles can this jump starter boost?
• It supports most 12V vehicles with up to 10L Gas / 8L Diesel engines, including cars, trucks, motorcycles, tractors, lawnmowers, SUVs, snowmobiles. For repeated jump-starts, wait at least 10 minute between attempts to allow capacity recovery.
• Why is there grease around the connection after inflation?
• The pump uses an oil-lubricated compressor for better sealing and longer lifespan. The grease is non-toxic, does not affect tire airtightness, and won’t cause any harm.
• How long does the battery hold a charge?
• It can stay charged for up to 2 years. However, to maximize battery lifespan, it's recommended to recharge the unit every 3 months.
• Why does the battery capacity run out after only 1 jump start?
• The battery capacity will appear "run out" after a jumpstart trial because of delivering a peak current at 4,000 amps in 12V. Just leave it unused for 10 mins or so and the capacity will increase gradually for laterh usage.
• Welcome to GOLDFOREST We’re a passionate team focused on building smarter, safer car accessories you can count on—wherever the road takes you. Our promise is simple: Premium Quality – Thoughtfully built to perform and last. You First – Questions or concerns? We're here to help, always.
• How many tires can this jumper box with air pump inflate on a full charge? It can inflate up to 8 car tires from flat to 36 PSI on a full charge. For continuous use, allow at least 1 minute between inflations to prevent overheating and auto-shutdown.
• What vehicles can this jump starter boost? It supports most 12V vehicles with up to 10L Gas / 8L Diesel engines, including cars, trucks, motorcycles, tractors, lawnmowers, SUVs, snowmobiles. For repeated jump-starts, wait at least 10 minute between attempts to allow capacity recovery.
• Why is there grease around the connection after inflation? The pump uses an oil-lubricated compressor for better sealing and longer lifespan. The grease is non-toxic, does not affect tire airtightness, and won’t cause any harm.