The BCSAD1 is a Usb Pd (Usb Power Delivery) compatible quick charger for high-capacity NPSA100 batteries. It can simultaneously charge two batteries to full in about 115 minutes, or a single battery up to 80% full in just 55 minutes when you're in a hurry.Dual Battery ChargerRapidly charges two high-capacity NPSA100 batteries simultaneously when connected to a Usb Pd power supply.Fast chargingTwo NPSA100 batteries can be simultaneously charged to full in about 115 minutes, or a single battery up to 80% full in just 55 minutes when you're in a hurry. Charge and health status indicatorsLED indicators display the charge status of each battery independently in four steps. The provided Battery Health button displays battery condition via a three-step Led indication.Compact and portableThe flat, low-profile design measures just 84.5 x 36.0 x 67.0 mm (3 3/8 x 1 7/16 x 2 3/4 inches) and weighs approx. 130 g (4.6 oz).Functional safetyDesigned specifically for Sony's NPSA100 batteries, with ample heat dissipation measures plus heat monitoring and control built in..