Unistellar Help Center

Battery: everything you need to know


The telescope, its electronics, and sensors are powered with a rechargeable internal battery that can be replaced in case of malfunction or permanent damage. We recommend you fully charge your eVscope before your first observation. The eVscope’s battery lasts up to 10 hours, whilst the eQuinox's battery - is up to 12. Please note that you need to recharge your unit every 2-3 months to avoid battery issues.

You can also use your telescope while its battery is charging. The charging time can vary from 6.5 hours (OFF mode) to 8 hours (while operating). To charge the battery, you have to use a USB-C charger* (check if it's fully connected, sometimes, you'll hear a click when you'll connect it).

The LED will be blue and it will go from six flashes to none. Flashes decrease as the battery gets more charged. In the end, the LED will stay blue with no flash. That's how you know your battery is fully charged. Also, the app will show a full battery icon (eVscope section). 

You can absolutely use a power bank to charge your Unistellar telescope via the USB port. Any would do provided it's USB 5V, we recommend those delivering at least 2A. 2000mAh gives approximately +1hour. Also, please use a good quality charging cable. The USB port is not meant for anything else but charging (it's not there to connect to your PC or to get any data).

*Charger specifications: a standard smartphone charger (USB-C) 5V 2.4A can be used, non-quick-charge (and without an adaptive range). 


To clarify the blinking process:

  • Blink 6 times: the battery charge is between 0% and 64%
  • Blink 5 times: the battery charge is between 64% and 72%
  • Blink 4 times: the battery charge is between 72% and 80%
  • Blink 3 times: the battery charge is between 80% and 88%
  • Blink 2 times: the battery charge is between 88% and 96%
  • Blink 1 time: the battery charge is between 96% and 100%
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