This article describes some general guidelines for long-term storage of robots and spare parts. This Applies for all robot generations.

A robot is considered long-term stored when it is stored for a period of 6 months or more.

In order to keep the robot and spare parts in its best possible condition, it is recommended to follow normal good practice which is:

1. Storage temperature: 10-30°C
2. Humidity: RH20-60%
3. Universal Robots recommends to unpack and startup robot at least yearly and let them run a light load program rotating in all joints at least 90degree 5 times in each direction to distribute the lubricants. If possible, also mount spare parts joints on an arm and do the same operation routine.
4. In rare occurrences there might be a need for wiping down the robots after storage to remove any excess lubricants that have migrated out of the sealings.
5. The battery is designed to last for the lifetime of the robot and will not be charged when power is applied to the system. The battery service life is 8 to 10 years but can for e-Series and UR20/UR30 be replaced. 
6. Flash memory can lose their data capacity over time, therefore there is a potential risk that the data on e.g. the SD-card will have to re-flashed. See New Image Installation.