A former Apple executive has taken a senior role at battery manufacturer Advanced Battery Technologies (ABT).

Formerly of Apple, Christopher Gee has joined ABT as president. While at Apple he looked after some of the company's enterprise customers.

Recently, he served as a senior advisor and chief technology officer for China-based biotechnology companies publicly traded in the US.

Gee will be based in New York and will also have an office at the company's headquarters in Harbin, China.