IKEA dimmer battery info always 100%

I have a few Ikea Rodret and Styrbar dimmers connected to HA via ZHA and using non rechargeable batteries. It works really well but there is one thing bothering me, the battery data for each dimmer is always 100%, while I’d love for it to be true and my cheap Aldi batteries are the most powerful batteries on the planet, I feel there is something else going on? I obviously want some kind of indication of when to change / charge the batteries other than just finding out it’s not working! What experience/ knowledge do people have on this? Will it eventually jump from 100% to some low value all of a sudden before it dies? Would rechargeable batteries make a difference, or would using another Zigbee system in HA make a difference? Thanks in advance!