Review: Bluetti AC200MAX Expandable Portable Power Station + B230 Expansion Battery The Bluetti AC200MAX is an expandable portable power station. It features a high-capacity 2048 Wh LiFePO4 battery that retains 80% capacity after 3,500 charges. It can power high-demand appliances like microwaves, and its capacity can be doubled or tripled with optional expansion batteries.