Philips SCB5655NB/93 is a versatile battery charger that can charge both AA and AAA batteries simultaneously. With its fast charging capabilities, it can fully charge 1 to 4 AA batteries in up to 45 minutes. The built-in timer prevents overcharging, ensuring the longevity of your batteries. Additionally, the charger features trickle charge technology, which keeps your batteries fully charged and ready for use when stored in the charger. The included 2300 mAh MultiLife AA batteries provide extended power for your devices.