The Halo Bolt has 58,830mWh of battery power within, and the official description suggests that it can provide up to several hours of additional usage for a MacBook Pro or iPad Air. Lifewire / Andrew Hayward Charging Speed and Battery: Not so long-lasting The right side, meanwhile, has the 115V AC/65W max AC power plug input for laptop chargers and other plug-in devices. The front face is where most of the ports sit, including two USB-A ports (5V/2.4A), a DC input for the charging adapter, and jump-start inputs hidden behind a small door. It’s made of mostly thick black plastic outside, including a glossy brushed silver top layer with an imprinted Halo logo. Smaller, cheaper battery packs are available for smartphones, but this beast is made for heavier-duty needs and is designed accordingly. This big brick of a battery pack comes in at 7.2 x 1.6 x 3.8 inches (HWD) with a weight of more than 1.5 pounds. While certainly portable, the Halo Bolt isn’t designed to be pocket-friendly. I tested the Halo Bolt for a week with multiple devices, including laptops and smartphones. Still, the added versatility gives the Halo Bolt a unique edge in the market. Granted, it doesn’t pack as much power as some dedicated laptop chargers, which may be a better option for that need. This heavy brick of a portable charger proves to be a handy tool, especially in the car-whether for emergencies or when you need to top up a device while you’re away from home. After comparing the capacity, peak amperage, and ports for each model, we determined these as nine of the best portable jump starters.There are all sorts of portable laptop chargers designed for smartphones, tablets, laptops, and mobile game systems, but the Halo Bolt one-ups them in one fundamental respect: it can also jump-start your car. ![]() ![]() Along with our use, we read through hundreds of Amazon reviews to separate good jump starters from great ones. We’ve spent many hours charging batteries with different chemistries (like lithium-polymer, lithium-ion, or nickel-metal hydride) and evaluating all manner of cars and accessories. Along with faster charging, a 12-volt rail expands the range of devices that you’ll be able to power. ![]() Most jump starters provide a number of USB ports, but the real kicker is to look for a 12-volt outlet. Outside of their main function, battery jump starters can also recharge phones, tablets, and other portable tech, so pay attention to the interface ports. ![]() However, this is most relevant when starting your vehicle, as anything above 1,000 amps would fry your mobile device in an instant. More amperage generally leads to faster charge times and the ability to start bigger engines-as long as your vehicle can handle it. This measures how much electricity the battery can supply in a given moment. We recommend looking for jump starters that have at least 10,000 mAh of capacity.Īlong with capacity, peak amperage is another important metric to look out for. Although some manufacturers measure battery capacity in terms of how many vehicles or devices it can charge, the standard unit of measure is milliampere hours (mAh). These devices, sometimes called battery jump starters, are essentially heavy-duty backup batteries equipped with jumper cables, so take into account metrics like capacity, amperage, and interface ports.īattery capacity is important because larger packs will be able to re-fire a greater number of vehicles and devices before they need to be recharged-bigger numbers equate to more capacity. Thankfully, portable jump starters are quite simple to compare to one another.
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