Schumacher Electric 12V Lithium Jump Starter SL1674 — 1500A 4-in-1 Power Pack with 10W Wireless Charging

The Schumacher SL1674 is a compact 4-in-1 1500A 12V lithium jump starter that also serves as a 10W wireless charger, dual fast-USB power bank, and multi-mode emergency flashlight.

When a car or truck battery dies, you want a reliable, portable solution that restarts engines quickly and also keeps your devices charged while you wait. The SL1674 combines a high-output jump start capability with modern charging features and safety protections in a weather-resistant package. It’s designed to start gasoline engines up to 8.0L and diesel engines up to 4.5L, while offering wireless and wired charging plus a bright three-mode LED lamp for roadside use.

How quickly and reliably will the SL1674 start my vehicle?

The unit delivers up to 1500 amps of peak starting power and includes Pre-Boost and Pre-Heat functions that help when temperatures are low or batteries are deeply discharged. A dedicated Jump Start Override Mode lets you attempt starts on very low-voltage batteries that some automatic systems won’t detect.

• 1500A peak output for strong cranking power
• Starts gasoline engines to 8.0L and diesel to 4.5L
• Pre-Boost and Pre-Heat aid cold and deeply discharged batteries
• Override mode for manual starts of very low-voltage batteries

What charging options does this power pack provide for phones and devices?

Beyond jump-starting, the SL1674 acts as a versatile power bank. It has a 10W wireless charging pad for cable-free topping up, plus both USB-A and USB-C ports rated for fast 3A output so you can quickly charge smartphones, GPS units, or tablets while roadside or camping.

• 10W wireless pad for Qi-compatible phones
• 3A USB-A port for rapid charging
• 3A USB-C port for modern devices and faster top-ups
• 37Wh internal lithium cell with multi-cell technology for reliable output

How does the SL1674 protect my vehicle and me during use?

Safety features are integrated to reduce risk during jump starts and charging. The unit includes reverse-polarity protection, short-circuit prevention and guards against voltage spikes, overloads, and extreme temperatures so both the pack and connected electronics remain protected.

• Reverse polarity and short-circuit protection
• Overload, high/low temperature, and spike defense systems
• Color-coded clamps and easy 10-gauge, 15.5-inch cables for secure connections
• IP65 rating for water and dust resistance in harsh conditions

What lighting and usability features help at night or in emergencies?

A built-in three-mode LED light offers steady, SOS, and strobe settings so you can illuminate a work area, signal for help, or use a strobe for visibility at night. The compact housing and clear directions make it straightforward to store, carry, and operate even under stress.

• Three-mode LED: steady, SOS, and strobe for multiple scenarios
• Compact, portable design fits glove boxes, trunks, or backpacks
• Clear user instructions and robust clamp design for quick setup
• Recharge time: approximately 4–5 hours via USB

Who should choose the Schumacher SL1674? This model is ideal for drivers who want a compact yet powerful roadside kit that goes beyond a basic jump box. Commuters, weekend adventurers, fleet drivers, and anyone who values device charging and weather resistance in one unit will appreciate its mix of starting power, safety features, and modern charging conveniences. Keep it in your vehicle or emergency stash if you want a dependable start solution that also charges phones, powers accessories, and improves safety during roadside events.