Initially, I was fine with the stock ones. Up until two days ago, when I had a balls shrinking experience with one battery. Mine, like every other kit came with two batteries. One that looks normal, and one with burn/corrosion/stained marks on the negative end of the batt. Being very skeptical. I used the normal looking one. It lasted around 5days with just one charge until I had the bad experience. So now, I have one that I don't dare to use cause of the incident, and one that looks dirty. That is why I desperately need a new battery. I'm not a tech person, so I know nuts about batteries. I just want my face to be fine. Hahahahaha. So any kind souls with any info on where I can get it. Please let me know. I'll go down to sim lim soon, thanks dirtevil.