The eMotimo 23000 mAh battery will provide your spectrum ST4 with 5-8 hours of shooting depending on your motor move profile and the number of motors being powered. This pack is great for going portable. Included as well is a 6FT extension cable.
If we are out of stock or you are ordering internationally check out this site for Amazon purchasing options: 23000mAH pack on Amazon.
Capacity: 23000mAh / 85 Wh
DC output: 9V, 12V, 16V, 19V, 20V (choose 20 volts for spectrum operation typically)
DC input: DC 20V / 2.0A from included charger
Weight of battery only: 560g or 1.25lbs
Weight Shipping: 2.5 lbs.
Size: 183mm x 123mmx 18mm / 7.2in x 4.85in x 0.71in