The Dolgin Engineering TC-40 4-Position Charger for Canon EOS REBEL T2i, T3i, T4 is a 4-position microprocessor-based battery charger. It provides fast, safe simultaneous charging of 7.2V BP-827 batteries.
Simultaneous Charging: This charger offers safe simultaneous charging. All four batteries are ready in about 3.5 hours.
Dynamic Power Management (DPM) minimizes battery charge time. By dynamically adjusting battery charge current, more is allocated to the deeper discharged battery. Through this process the batteries are ready to use at about the same time. Worldwide Charging: A Worldwide 100-240 VAC Power supply works in most locations. With an optional cable (not included), 12V DC car power can be utilized when AC power is not available.