Product Review

This Duo LCD Charger from Watson charges 1 or 2 EN-EL20 batteries via the included dedicated plates. These can be replaced by optional plates for various other batteries. The Duo can even simultaneously charge 2 different batteries with different voltages. It runs on 100-240VAC power, allowing for use all over the world. Charging time is between 2 and 6 hours, and the charger also features a USB 2.0 port for charging another device simultaneously. The LCD screen provides a digital read-out of each battery's charge percentage--even when the charger is unplugged--via the test button. The Duo includes a power cord with a 2-prong US plug, as well as a 12VDC car charger that plugs into a cigarette lighter.

Input Power: 100-240 VAC, 50 / 60 Hz, 12 / 24 VDC, 2.0 A

Output Power: 1.2-8.4 VDC, 2.0 A (max.), USB 2.0 port: 5.0 VDC, 2.0 A (max.)

Charging Time: 2-6 hr

Interface: USB 2.0 port for charging another device

Operating Temperature: 32 to 104°F (0 to 40°C)

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

Dimensions: Charger: 4.9 x 4.5 x 1.75" (12.4 x 11.4 x 4.45 cm), Cord length: 4.7' (1.4 m)

Weight: 7.7 oz (218 g)