PowerBeat Pro Ear bud battery problem

I got my Powerbeat Pro ear buds for my Holiday gift from my husband. We are a big fan of Apple products and we have most Apple products in my household.

Unfortunately this powerbeat pro earbud has had the problem with charging from the day one I used.

One of my earbuds(left one) is always out of batteries after 1 or 2 hours listening to music on my work out. So I listen to music with only right one to finish up. That means I cannot expect any sound quality of listening music. I am the person who always fully charge any device anytime I am not using. So this should not be the issue. However it happens every time I use it for a month. If it happens until the end of this January I might need to bring it to Apple store.