In order to optimize your camera's work, use high-quality mobile power, mobile power needs to output 5V 2A -4A current. When the power or current is insufficient, you can't shoot. The mobile power has an automatic sleep mode,Use the camera for a long time to set the camera standby time to the maximum standby time. Do not use computer USB, because the computer USB 2.0 output voltage is mostly 5v, but the current is less than 500mA current. Some mobile phone/tablet USB charger and resistance recognizer, do not know the camera, the current can not meet the requirements, so it is not recommended. USB cable Features:
Input:5V 2-4A
Output:8V
Conversion efficiency:92% (DC-DC Efficient conversion rate)
USB plug Specifications:USB2.0
length:105cm

USB power adapter Features:
Quick Charge 3.0
Input power 100-240V/AC
Output:5V 3A / 9V 2A / 12V 1.5A

DC drive cable It works wonderfully:
For Olympus OM-D E-M5, Olympus E-M5
For Olympus OM-D E-M5 II, Olympus E-M5 II
For Olympus OM-D E-M1, Olympus E-M1
For Olympus PEN E-P5, Olympus E-P5

Package Includes:
1 x DC Drive Cable
1 x DC Coupler BLN1
1 x QC3.0 USB Adapter