Details
Celestron - PowerTank Lithium Telescope Battery – Rechargeable Portable 12V Power Supply for Computerized Telescopes - 10 Hour capacity/86 Wh - Red/White LED Flashlight - 2 USB Ports

PORTABLE POWER MADE FOR ASTRONOMERS: The perfect solution for most computerized telescopes, PowerTank Lithium features a 12V connection, 10 hours of battery life, an onboard red/white LED flashlight, USB ports, and more. Mounts directly to the tripod leg.
SMALLER, LIGHTER, SAFER: Unique Lithium-Iron Phosphate (LiFePO4) chemistry makes this battery smaller and easier to maintain compared to sealed lead acid batteries, and safer than lithium cobalt batteries. Does not use toxic heavy metals.
10 YEARS OF DEPENDABLE PERFORMANCE: Unlike other batteries with limited lifespans, PowerTank Lithium will be your companion for years of astronomy adventures; it is rated to withstand up to 2000 charge cycles.
WORKS WITH A VARIETY OF DEVICES: 12V connection works with all current Celestron computerized telescopes. PLUS, two USB ports—one quick charge and one regular.
AN EMERGENCY KIT ESSENTIAL: Keep PowerTank Lithium charged and ready for unexpected power outages. The USB ports will keep your devices charged while the flashlight will illuminate your surroundings.
The new PowerTank Lithium keeps the charge going for the astronomer on the go. The Lithium Phosphate (LiFePO4) battery chemistry has significant advantages over other battery chemistries. - The LiFePO4 has an un-recharged shelf life of 10 years compared to 3 years for the Lithium Ion and 6-9 months for a Sealed Lead-Acid battery. - The battery performance of the PowerTank Lithium degrades at a much slower pace than other chemistries. - The LiFePO4 can be charged and discharged 2000 times compared to only 500 for a Lithium Ion battery and 300 for sealed lead-acid designs. - The batteries will last as long as the telescope you use it with! - The LiFePO4 uses phosphates instead of environmentally hazardous elements like cobalt or lead commonly found in other rechargeable batteries. - Can withstand higher temperatures than lithium-ion designs and will not be a fire danger if accidentally punctured. This combined with it’s rugged design make it the perfect outdoor power supply. Keep your telescopes, smartphones, tablets, GPS systems, cameras and other USB-powered devices as active as you are with PowerTank Lithium—the ideal outdoor portable-charging solution for your electronic gear.