ProMaster Dually Charger - USB for OM System BLS-50

Two batteries are better than one, but only if they are charged and ready for action. The ProMaster Dually Charger for the OM System BLS50 can charge two batteries simultaneously. It is very compact, and it offers the convenience of a built-in USB-A input cable that neatly stores in the base of the charger. 

Since it draws power from USB-A sources, you can use the Dually Charger with a USB AC Adapter (not included), laptop, power bank, car charger, and more (2.2A minimum current required). 

Standout Features:

• Compact design 
• Charges two batteries at once
• Has a built-in USB-A cable that stores in the base of the charger
• Also works with the Olympus BLS5 and BLS1 batteries

Specifications:

• Dimensions: 3 3/16" x 2 1/4" x 1" / 80 mm x 58 mm x 25 mm
• Weight: 2 3/8 oz / 67 g
• Input DC 5 V 2.2 A (Min) via USB-A port
• Output DC 8.4 V 
• Output current 600 mA

Charging time is approximately 2 hours 30 minutes from depleted to 100% for 2 batteries charging simultaneously.