Graupner Ultra Duo Plus 80 1000W (2 X 500W) Desktop & Mobile Battery Charger Dual channel, 500W at 20A each (2 channels 1000W) 2 x 20 battery memories for storing charge profiles (total 40) High-contrast LCD screens (128 x 64) with blue backlighting Protective circuit technology (low-input voltage, over-current voltage, over-temperature, short- circuit, etc) Equipped with optimized software for charging, discharging and balancing