u/Embarrassed-Trick-44

I have had to buy 2 versions of the same battery now. I have a regular kodo battery, the one with three buttons and it keeps saying that it can’t connect to an applicator. It will work fine for a week and then be on and off. I am trying to use it now and it keeps blinking every time I try to hit it. If someone else has dealt w this before PLEASE HELP ME