● To maintain CTECHi products, keeping the battery power above 20% while using or storing the power station regularly is recommended. ● Even after 6 months of non-use, a fully charged CTECHi power station will store more than 50% of the charge. However, we recommend you charge the device every three months, even if it is not being used, to ensure the power station lasts you for an extended period. In case of a fully discharged product, you must charge it using the AC adapter. Please ensure you keep your power station at a temperature of 0-40°C (32-104°F) and between 10-40°C (14-104°F) while charging.