【 USB Dual Battery Charger】:Our Battery Charger allows you to charge 2 batteries at the same time.The 2 indicator lamps display the status of the battery. The indicator lamp flashes when charging and will be constant on when charging is complete. 【SPEEDY CHARGER】:5V 2.2A input and 2 batteries can be fully charged at the same time in 6 hours 20 minutes.Powered by USB sources, you can charge your battery with AC adapter, laptop, power bank or car charger, which enables you to refresh your battery wherever and whenever. 【Built-in USB cable & Included 40cm extension cable】:With the built-in USB cable, this battery charger is convenient to carry.If you need a longer USB charging cable to charge your batteries. 40cm extension cable extends your charging distance and makes your charging more convenient. 【SAFETY & PORTABLE】：Made of ABS material, light and durable.The charger will automatically detect when the batteries are fully charged and stop charging to prevent damage to your batteries. 【COMPATIBILITY】:Fits for Olympus BLX-1 battery