MyPilot not saying, battery is low on Phonak Naida aids!

Has anyone else had any trouble with regarding the MyPilot stating that you still had full battery in your aids but in fact my aids were beeping, one after the other and then half hour later they did go dead.

My MyPilot did then show that there was no battery left in my aids, once dead. Its seems not to be sending the signal through very well. Can I make it better? :confused: