We recommend the following temperature range for your eVscope or eQuinox:

• storage: -15 °C (5 °F) → +60 °C (140 °F) (recharge your battery regularly if storage > 2 months) 
• storage and recharge: 10 °C (50 °F) → +40 °C (104 °F)
• observation and recharge: 10 °C (50 °F)→ +40 °C (104 °F)
• observation: 0 °C (32 °F) → +40 °C (104 °F)

Tip: The eVscope's performance will be optimized if its mirror reaches thermal balance. If the temperature is below 0 °C, we recommend turning on your eVscope and getting it out at least 15 minutes (30 will be better) before you start observing.

Note: While using your Unistellar telescope in a very cold environment, we recommend covering it to provide relative insulation. The main effect of the cold will be a faster draining of the battery.