The state of a system whose battery has insufficient capability. For an emergency battery of a Smart Lift, a battery in insufficient state does not have the power to send the car to the closest floor in case in failure; It needs to be urgently replaced. For an emergency battery of a SOS Alarm system, the battery does not have the power to sustain the alarm system active for the minimum time defined by applicable regulation; It needs to be urgently replaced. In UE and other applicable countries such minimum time is at least one hour (as required by EN 81-28).