Celestron PowerTank Lithium Battery Pack - 18771

Say goodbye to bulky batteries and explore new dark sky sites with your telescope and this ultra-portable lithium battery pack by Celestron. Measuring just 7.5" tall and 3" in diameter, PowerTank Lithium boasts and 84.4 Wh capacity--enough power for up to 10 hours of observation!

Lithium ion technology comes to your telescope

You already trust lithium batteries to power your mobile device. But Celestron's new LiFeO4 lithium phosphate batteries significantly outperform even traditional lithium ion batteries found in handheld electronics.

If you already own a sealed lead acid telescope battery, you know that they have an uncharged shelf life of just 6-9 months. Twice a year, you have to fully drain and recharge the battery to keep it in good working order. Traditional lithium ion batteries do a little better, with a 3 year average shelf life. But PowerTank Lithium boasts a shelf life of 10 years. PowerTank Lithium also blows the competition away when it comes to lifetime charge cycles: 2000 versus 500 for lithium ion and 300 for sealed lead acid telescope batteries.

The lithium phosphate battery inside PowerTank Lithium is the battery of choice for many of today's electric vehicles thanks to its rugged construction and ability to withstand higher temperatures than lithium ion technology. Plus, since it contains phosphates instead of hazardous materials like cobalt and lead, it's a more environmentally-friendly option. Perhaps most important, lithium phosphate batteries do not pose a fire hazard if a cell is accidentally punctured.

PowerTank Lithium redefines the telescope power supply

With its impressive capacity, you'll have to worry about the sun coming up before your battery runs out. With power to spare, you can even tap into your PowerTank Lithium to top off electronic devices like smartphones, tablets, and portable GPS receivers via two built-in USB ports. There's also a built-in LED light with both red and white LEDs. Use the red light during your observing session and the powerful white LED to illuminate your site for quick cleanup. Both colors offer two brightness setting to choose from.

Thanks to their long shelf life, these batteries are perfect for your emergency kit, too.