Got the uni vape battery 3 days ago after it was recommended to me and in its first charge the battery didn't want to hold charge. So I asked if I could simply exchange for a new one but the clerk said there's noting he could do but only a 10% discount on a new uni battery. Didn't feel like it justified after just spending 30 dollars on one. Also didn't want to let me use the discount on a different battery brand disappointed.