Patent ID: 7005832

Claim:
Device for a battery charger, comprising: a first connection means ( 14 , 16 ) connected to the output lines of the charger, and a second connection means ( 16 , 24 ) for connection to the terminals of a battery to be charged, the second connection means comprising first voltage detection means for detecting a voltage over the output lines of the charger, second voltage detection means ( 80 ) for detecting a positive voltage over the terminals of the connected battery, a switch means ( 60 ) for connecting at least one of the output lines of the charger to the terminals of the battery, and a switch activating means ( 70 ) arranged to said first and second voltage detection means and configured for activating the switch means when both a voltage is detected over the output lines of the charger and a positive voltage is detected over the terminals of the connected battery, the activation of the switch means connecting the at least one of the output lines of the charger to the terminals of the battery and thereby connecting the charger to the battery.