This Duo LCD Charger from Watson restores power to one or two DMW-BLF19 DMW-BLF19 batteries via the included, dedicated plates. These can be replaced by optional plates for various other batteries. Additionally, the Duo can simultaneously charge two different batteries with different voltages. Charging time is between two and six hours. The unit also features a USB 2.0 port, which allows you to charge and power a mobile device while your camera batteries are being replenished. The LCD screen displays each battery's charge percentage--even when the Duo is unplugged--via the test button.
Running on 100-240 VAC power, the Duo can be used all over the world. It includes a power cord with a 2-prong North American plug, as well as a 12 VDC car charger that plugs into a cigarette lighter.

Watson DX-3640 Specs

Charger

DC Input Power: 12 to 24 VDC at 2000 mA

Output Voltage: 1.2 to 8.4 VDC at 2000 mA

Number of Battery Bays: 2

Multi-Bay Charging Modes: Independent

Indicator: LCD Display U

SB Port: 1 x USB Type-A

USB Output Current: 2000 mA

Operating Temperature: 32 to 104°F / 0 to 40°C

Storage Temperature: -4 to 140°F / -20 to 60°C

Cable Length: 40.94" / 104 cm

Dimensions (W x H x D): 4.9 x 4.5 x 1.7" / 12.4 x 11.4 x 4.3 cm

Weight: 7.7 oz / 218 g

Adapter Plate

Dimensions (W x H x D): 2.0 x 2.6 x 0.5" / 5.1 x 6.6 x 1.3 cm

Weight: 0.7 oz / 20 g