The present invention relates to a battery arrangement for an electrically powered industrial vehicle. The battery arrangement comprises a battery and ancillary equipment arranged to connect the battery to the vehicle. The battery is removably connected to the vehicle and comprises a current sensor. The battery is in a first state (A) when a measured current out from the battery exceeds a predetermined first current level. In the first state (A) the battery is prevented from turning power off to the vehicle. The battery is in a second state (B) when a measured current out from the battery is below a predetermined first current level for a predetermined first period of time. In the second state (B) the battery is allowed to turn power off to the vehicle.