Power your telescope anywhere with the powertank lithium lt, celestrons smallest and lightest lithium ion power pack'. '.strtoupper('t')his handy device is a must have for your telescope and accessories, camping gear, emergency kit, and more'. '.strtoupper('t')he celestron powertank lithium lt is built with lithium nickel manganese cobalt oxide linimncoo2 or nmc technology, which delivers a steady charge over long periods and requires less maintenance than a traditional sealed lead acid battery'. '.strtoupper('u')nlike other lithium ion power packs in this price range, the powertank lithium lt was designed for astronomers by astronomers, specifically for the unique needs of computerised telescopes'. '.strtoupper('t')elescope electronics are very sensitive to voltage'. '.strtoupper('p')owering a telescope with lower than optimal voltage can cause the motors to strain with heavier loads and can even cause the electronics to glitch'. '.strtoupper('t')he powertank lithium lt uses a built in voltage regulator to ensure that it delivers at least 11.8 volts for most of the life of the battery, until the battery is depleted and shuts off'. '.strtoupper('c')ompetitor batteries claim that they hold enough watt hours of electricity to power your telescope for hours'. '.strtoupper('t')he technology in these batteries was originally developed to power much lower voltage electronics, such as home cpap machines'. '.strtoupper('a')lthough the voltage actually being delivered starts off at 12v, it diminishes rapidly, impacting your telescopes performance and becoming functionally useless within about 2 3 hours'. '.strtoupper('t')he engineers at celestron worked hand in hand with battery suppliers on powertank lithium lt to ensure that it does not experience this dropoff in performance'. '.strtoupper('t')he built in voltage regulator ensures a stable 12v output, regardless of the amount of charge left in the battery'. '.strtoupper('t')his keeps your telescopes electronics safe and performing their best, so you can focus on astronomy'. '.strtoupper('t')he nmc chemistry used by the powertank lithium lt offers far more advantages than the commonly used lithium cobalt oxide batteries found on the market today'. '.strtoupper('b')esides having a longer shelf life and three times the number of charge cycles than licoo2 chemistry, our nmc battery offers overcharge and over discharge protection and can withstand temperatures 100o f 60o c higher than licoo2 batteries making the nmc less likely to experience thermal runaway'. '.strtoupper('c')ompared to a lead acid battery, the powertank lithium lt is smaller, lighter, more efficient, and better for the environment'. '.strtoupper('i')t offers better performance, a longer lifespan, and safer operation than other low cost lithium ion battery chemistries'. '.strtoupper('i')t also offers automatic shut off, reverse polarity protection, charging discharging protection, overcurrent protection, and short circuit protection'. '.strtoupper('t')he power packs extremely portable form factor means it can go anywhere from a remote dark sky location for astroimaging to a weekend of camping'. '.strtoupper('w')hen it is powering your telescope, use the included 2 straps to secure the unit to your tripod leg where it is out of the way'. '.strtoupper('b')esides the power cable to charge your telescope, no other cables are needed'. '.strtoupper('i')f you need to power your telescope and charge electronic devices simultaneously, the powertank lithium lt features two output ports 1 12v dc port for the telescope and 1 fast charging 2.1a usb charging port for smartphones and tablets'. '.strtoupper('t')his usb port can also support any accessories that require 5v usb power'. '.strtoupper('t')he powertank lithium lt can travel with you on your next vacation'. '.strtoupper('a')t 73.3 watt hours, it meets current faa regulations 160 wh for transportation in your carry on baggage'. '.strtoupper('p')lease check in advance with your airline to verify they do not have stricter policies'. '.strtoupper('d')o not place powertank lithium lt in your checked baggage'. '.strtoupper('s')pecifications battery capacity 73.3 wh charging input 16vdc 2000ma charge time from flat 4 hours telescope power port 12v dc 3000ma, voltage regulated, 5mm 2.1mm tip positive jack car battery adapter port none usb charging port 1 output 5v dc 2100ma auto shutoff threshold current less than 250ma for 4 hours telescope power cord 6.5 ft 2 m with connector for celestron telescopes strap 2 wide hook and loop strap for attachment to tripod leg product dimensions 190.5mm x 101.6mm x 50.8mm 7.5 x 4 x 2 product weight 1.4 lbs .63 kg powertank lithium lt compatibility list'. '.strtoupper('w')ill power any computerised mount compatible advanced vx astro fi nexstar evolution nexstar gt nexstar slt nexstar se series lcm series skyprodigy