Halo Compact Bolt
We built the Halo Compact Bolt to get you back on the road fast when your battery dies. This portable jump starter delivers 57,720 mWh of lithium power in a design small enough to fit in your glove box or center console.
Whether you’re stranded in a parking lot or preparing for a road trip, our Compact Bolt handles gas engines up to 4 cylinders with confidence. The integrated LED flashlight and dual USB ports make this more than a jump starter—it’s your all-in-one roadside safety kit.
Power specs & included accessories
Battery Technology & Jump-Start Performance
The Halo Compact Bolt uses high-density lithium polymer cells that hold their charge up to 12 months between uses. Unlike traditional lead-acid jump boxes, our lithium design weighs a fraction of the bulk while delivering 200 peak amps—enough to turn over a dead 4-cylinder engine in seconds.
You’ll get multiple jumps per charge depending on your vehicle’s battery condition. Cold-weather drivers appreciate the lithium chemistry, which performs reliably down to 0°F when lead-acid solutions struggle. The built-in LCD battery gauge shows remaining capacity at a glance, so you always know when it’s time to recharge.
USB Charging & Multi-Device Power
Beyond jump-starting, the halo compact bolt serves as a portable power bank for your everyday electronics. Two USB-A ports output 2.4 amps each, charging smartphones to 50% in about 30 minutes and fully powering tablets, Bluetooth speakers, or GPS units on long drives.
The 57,720 mWh capacity translates to roughly 4-5 full smartphone charges before the unit needs replenishing. We’ve found this especially useful on camping trips and tailgates, where a single Compact Bolt can keep multiple devices running all day.
LED Flashlight & Emergency Signaling
The integrated LED flashlight on the halo compact bolt produces 140 lumens—bright enough to illuminate your engine bay at night or light a path to safety if you break down on a dark roadside. Press the power button once for steady beam mode, twice for strobe, and three times for SOS emergency pattern.
We positioned the light on the unit’s edge so you can set the Compact Bolt upright on your hood or trunk while you work, keeping both hands free to connect cables. The SOS mode flashes the international distress signal, visible from over a quarter-mile away to alert passing drivers.
Essential Jump Starters & Power Solutions
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Common Questions About the Halo Compact Bolt
You’ll typically get 2-4 jump starts per charge depending on your vehicle’s battery condition and engine size. A newer battery that’s simply drained from leaving lights on requires less power than an older, degraded battery. We recommend recharging the Compact Bolt after each use to ensure it’s ready for your next emergency.
The Compact Bolt is rated for gas engines up to 4 cylinders (1.8L displacement). This covers most compact and mid-size sedans, coupes, small SUVs, and motorcycles. If you drive a truck, V6, or diesel vehicle, consider our higher-capacity models like the Halo Bolt 58830, which handles up to 6-cylinder engines.
The lithium battery maintains 80-90% charge for up to 12 months when stored in a cool, dry environment. We recommend checking the LCD battery gauge every 3-4 months and topping off the charge if it drops below 50%. This practice extends the overall lifespan of the lithium cells and ensures the unit is ready when you need it.
No, we recommend disconnecting all USB devices before attempting a jump start. The current draw during a jump is substantial, and you want the full battery capacity dedicated to cranking your engine. Once the vehicle is running, you can reconnect your devices to the USB ports for charging.
The Compact Bolt is splash-resistant but not waterproof. You can use it in light rain or damp conditions, but avoid submerging it or allowing water to pool around the USB ports and charging input. The jumper cable clamps are insulated to prevent shock, but we recommend wiping battery terminals dry before connecting for optimal conductivity.
First, verify the unit has sufficient charge—the LCD screen should show at least one bar. Check that clamps are firmly attached to the correct battery terminals (red to positive, black to negative). If connections are correct and the vehicle still won’t start, your battery may be completely failed rather than simply discharged, requiring professional replacement. The Compact Bolt’s safety circuits prevent operation if it detects a short or reverse connection.
Plug the included micro-USB cable into the Compact Bolt’s charging port and connect the other end to any standard USB wall adapter (5V/2A or higher recommended for fastest charging). The LCD screen displays charging progress, and a full recharge from empty takes approximately 4-5 hours. You can also use a car charger adapter or laptop USB port, though these may charge more slowly.