Where Can I Customize the Battery?

I have been investigating for a long time, and I have found a more reliable battery supplier below, which looks very suitable for my product. I don't know if there are any partners who have cooperation with them? What is the situation?

Founded in 1998, Grepow is a lithium polymer custom battery company in China who is mainly focused on high discharge rate, fast charge, and high energy density battery engineering and manufacturing. Grepow has worldwide offices in Germany and the U.S. There are currently three brands, Tattu, Gens ace, and Geshi.

With several years of development, Grepow has successfully developed specially shaped LiPo batteries. Grepow batteries won't only be square shaped; every shape is possible, such as triangle, round and curved shapes. These batteries can be used in many products. The battery shape can be designed according to the remaining space of your product, it will increase the battery capacity as well as the related working time.