This Dolgin Engineering Four-Position Battery Charger for Sony NP-FZ100 is a simultaneous charger for up to four NP-FZ100-type batteries, which are compatible with the Sony Alpha a9 and a7R III cameras. Each battery achieves full charge in less than 2.5 hours, even when charging four batteries at the same time. The charger accepts worldwide AC power and comes with a US power cable. The charger can also be powered by a 12 VDC power source using an optional cable. Each bay features a red and green LED which indicates the charge status of the battery.