EBL Smart Multi-Functional Battery Charger AA AAA 9V 6F22 Ni-MH Ni-CD Rechargeable Batteries (3 in 1) Fast charger - Quick charging IC, power your batteries super fast, makes your life more convenient. [3 in 1] EBL-802 could freely charge 2/4 AA/AAA Ni-MH/Ni-CD rechargeable batteries in pairs, and 1/2 pieces 9V Ni-MH/Ni-CD batteries individually. Safety Assurance: Controlled by MCU, and using -V pulse charging technology, double protection. Smart Charge Technology: Using Battery detection technology, automatically turn to trickle charge when batteries are full charged. Universal Useful Battery Charger: Worldwide voltage for 100-240V 50/60Hz adapter input, can be applied to supplied voltage globally.