Product details:

Open-Box — Keep your telescopes, smartphones, tablets, GPS systems, cameras and other USB-powered devices charged and ready with PowerTank Lithium LT—the ideal outdoor portable-charging solution. Celestron specially designed this product with the needs of amateur astronomers in mind; its packed with useful features. First, youll find a 12V connection for your Celestron telescope—no cigarette lighter port needed. Once your telescope is connected, attach the battery securely to one of the tripod legs with the included Velcro straps so it is safely out of the way. One USB port keeps your other devices charged, and can be used simultaneously with the telescope charger. When youre not observing, keep this battery charged and at the ready for unexpected emergencies. PowerTank Lithium LTs unique Nickel Manganese Cobalt Oxide chemistry which delivers a steady charge over long periods and requires less maintenance than a traditional sealed lead-acid battery. It will last you many times longer thanks to its un-recharged shelf life of 10 years and 2000 charge cycle lifespan. But most importantly, the PowerTank Lithium LT can withstand higher temperatures than standard lithium cobalt batteries and will not be a fire danger if accidentally punctured. All this combined with its rugged design make PowerTank Lithium LT the perfect outdoor power supply.This power bank offers a battery backup for up to 4 hours
2 wide strap helps you tie it securely to the telescope leg
Its 2.1A USB port lets you charge the devices in less time