Graupner Polaron PRO Charger, Red Full color 3" TFT LCD touch display for programming charge parameters, monitoring charge progress Accepts a range of DC power inputs: 11-28 V DC Channel 1 max 500 W/.1--20A; Ch 2 max 30 W/.1--3A @ 24V DC Channel 1: 1-14 cell Li-Ion/LiPo with balancing board connectors, 1-32 cell NiMH/NiCd, 1-12 cell Pb/acid Dual cooling fans reduce temperature during charge and discharge