Stickers don't working

I would like to raise my disappointment for working of Stickers bought last november 2016.
I know Stickers life is about one year but it is not possibile that after 6 months I am not able to connect to 4 of them (Of those I never used 3 for developing/testing purpose).
This is absolutely inconceivable!

Can I read from your post that testing them will drain the battery faster?