DC-Battery Australia is a Consumer Electronics company profession on COMPAQ Evo N400,N410 / Armada M700 Series, Prosignia 170, Evo N400C,N410C,N410C-470037,N410C-470039,N410C-470040 Series Laptop Battery selling high capacity batteries with build in security circuit also EVO N400 batteries are tested before ship from our warehouse.Base on 1 Year warranty for all our products. In here, EVO N400 100% compatible with COMPAQ EVO N400 orginal Li-ion battery.