Let's face it, we have all tried the cheap packs, but they never hold up. We will not sell packs like that. That is why we sell Tattu batteries by Gensace. Gensace offers a wide range of cell sizes, C ratings, and pack sizes. Best of all, they are honest, they do not overrate their cells. You will get the performance you are paying for. We have been extremely happy with these packs, and we are sure you will be too.If you don't see the size you need, please contact us, chances are we can get it for you very quickly.