The Weego JS12 Jump Starter the slimmer, more powerful self-starter can start dead car batteries

Rechargeable batteries and external battery packs have really taken advantage of advances in technology. Batteries are smaller and more powerful than ever, and consumers are starting to see some real benefits.

Now there are batteries, such as the Weego JS12 Jump Starter, that will fit in your back pocket that can charge your cellphone or jump-start your car.

The JS12 is the midsize version of Weego's line of jump-starters and will jump-start any gas engine up to 6.4 liters and diesel engines up to 3.2 liters (in other words, all but the biggest cars and trucks). It works in temperatures from 4 below to 140 degrees.

The Weego is 6.25 inches by 3 inches by 1 inch. It weighs just under 1 pound. There's a port under a rubber cover that's used to connect the included red and black clamps to your vehicle's battery. The cables are not very long, so you'll be resting the JS12 on top or very near your car's battery when you use it.

The JS12 gets its power from an included wall plug or 12-volt car adapter, and it takes about three hours to charge.

The JS12 also can charge your smartphone, tablet or any other device powered by USB, plus most laptops (except MacBooks).

Weego also included a flashlight. The light has a strobe mode and can blink SOS in Morse code for emergency signaling.

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