Hello !
Many devices are powered by batteries with a pretty lame accuracy regarding the power left.
It would be nice to be able to add the battery change date on a entity to track, from a time perspective, when was the last time we juiced it up.
It could for example be useful when we are starting to see an erratic connectivy on a zigbee device which battery is still displayed as 50% or more.
The next level would be to have a simple battery dashboard to quickly see all those info (charge, last battery change etc…) in a single view.
Thank you 
