The CG-207 is one of the most easy to use and lightweight auto peak detection charger available on the market. Charge 5~7 Cell NiCD and NiMH Battery Packs with a "One Touch" Peak Charger. Features: • Constant 2A Charge Current • Charging voltage range 5-7 cells (6-8.4v) • Cutt off delta voltage of : 0.05V • Input voltage : DC 11-15v • Charges all popular 5 ~ 7 Cell NiCD and NiMH Batteries • Protection Circuitry against Reverse Polarity Damage • One Touch Charging for 100% Capacity of your Batteries I have had to put Mains Charger as it wouldn’t let me List 12 volt as its power supply to charge from