Load on 2 times the lights also shone even after 20h and I therefore said that the batteries are still charged. Thus, the device appears to be defective and was sent back. The reversal of the dealer and Amazon worked great.
What important in this device is to know it recharges the batteries even if they are already full is continued until the timer expires. Therefore not suitable for short recharge of half-full batteries. Charging is therefore not for a long battery life.
I'd grab the next time again for Sanyo charger MQR06. This is controlled microprocessor and so monitored the loading and also has a fast charge mode. For the couple of more highly recommended.