... : Monophasic technology /Biphasic technology (optional) (3) Energy accuracy ∠+1% (4) Energy selection 0,3,5,7,10,20,30,50 ... type: Rechargeable lithium battery.(2) Charging time: Time-Minimum of 4 hours for full charging.(3) Battery charging: During AC Power Supply ... operation of the device.(4) Charging /Low Battery Indication: Red LED.(5) Battery Capacity: ...