What is the fine-grained topic of the following text: <> Midland lithium battery maker gets $1 billion China contract - A Midland-based company, XALT Energy LLC, says it has signed a $1 billion multiyear deal to supply lithium batteries to a Chinese electric bus manufacturer and will hire 300 people. Only return the topic.
XALT Energy LLC's $1 billion contract with a Chinese electric bus manufacturer to supply lithium batteries