Fomito LCD Dual Digital Battery Charger for Sony FW50 A5100 A6000 RX10 A7R A7S A7 II NEX7 5R Batteries This New Dual LCD Charger for Sony FW50 is a modern dual battery charger with advanced features and LCD display. After plugging the charger and mounting batteries the charger tests battery charge level and begins charging in the chosen mode. The "L" mode charges slowly, but the battery is charged better - it will last longer. The "H" mode is faster so that you can get your batteries charged faster when in a hurry. The built-in microchip protects the batteries from overheating and overcharging. When the batteries are fully charged and ready for work the process will stop.