This week I took the time to tear down the weather station integrated sensor suite and give it a good cleaning. It's been about 3 years since the last time it was done and the collection of dirt, spiders and debris left me concerned that the station would continue to perform well.
When the solar panel is not charging the system, backup is a small lithium 123A battery. Incredible as it may sound the battery was still acting as backup but installing a new one now would keep me from having to deal with replacement when conditions were less favorable.
All seemed to go well and my data quality reports look good.
Hopefully I'm good for another 3 years.