This is hands-down the best emergency battery that we've seen. Imagine being able to jumpstart your car as well as power/charge any device that you have. Jumpbox does just that... and it maintains its own charge for up to 2 years.
From the manufacturer:
StarkPower's "JumpBox" Lithium Ion battery is the ultimate in weight versus power technology to jump start 12V vehicles (SUV, TRUCKS, BOATS, RV, PowerSport). This is the most powerful, safest, "JumpBox" that you will come across to directly connects to your Lead-acid battery. Requires no change to your existing system. The "JumpBox" starter batteries have the safest, most powerful Lithium Chemistry along with an internal microprocessor controlled cell balancer for added performance and battery life.
Here are just a few of the things that you can power with a Jumpbox:
- SUVs, TRUCKs, RVs, BOATs up to 6L
- Motorcycles, ATV, UTV, Jetskis, Snowmobiles or any other 12V engine
- Smartphones, laptops, and any other device that can charge over USB