Graupner Polaron EX Combo Charger, Blue Full color 3" TFT LCD touch display for programming charge parameters, monitoring charge progress Accepts both AC and DC power inputs: 100-240 V AC, 11-28 V DC 2 X max 220 W channels under AC use, 2 X 400 W max @ 24V DC 1-7 cell Li-Ion/LiPo with balancing board connectors, 1-14 cell NiMH/NiCad, 1-12 cell Pub/acid Dual cooling fans reduce temperature during charge and discharge. Temperature range (0~40)