Generally, Anker power bank’s static power consumption is low and it would take between 20 to 36 months for the power bank to be completely drained. However, It is also worth noting that the battery's chemicals will become less active if the power bank is left unused for an extended period of time.
In order to extend the lifespan of your power bank, it is recommended to follow these advice:
1. Discharge and recharge the power bank at least once every 3-4 months.
2. Place your power bank in a well-ventilated and dry place that is away from moisture and high temperatures.
If you have any further questions, please contact MyAnker Customer Support for assistance.