Opti-Beauty Tailor Wave Hair Curler (Kidlington OX5)

I have only used this 5 or 6 times, but for some reason the battery no longer holds a full charge. I've even left it overnight but it will only get to halfway which is nowhere near enough time to curl my hair. However, I thought it might be enough charge for someone with shorter and/or thinner hair, so if you would like this please let me know :)