The package includes the jHub Rock Power Bank USB Charger and a micro USB cable that is used to charge the jHub Rock. NOTE: *To charge your phones, tablets and other USB devices you will need the provided charging cable for your device which will connect into your standard USB of the jHub Power Rock.
The battery can be recharged from any PC or laptop USB port or any USB AC adapter.A USB AC adapter with 0.8A or more output current will maximize charging speed.Lower currents will prolong the charge time.
The efficiency of this battery is around 68%-80%. The internal circuit board is 90%efficient, this accounts for power lost through circuit heat and voltage conversion (this is standard for external power bank chargers), which is up to 5% above the industry average. Energy is also lost within the charging cable and the device being charged (approximately 15-20%).
1) When the battery is charging your devices, a steady blue light will indicate that your device is being charged. 2)When charging your jHub Rock, a steady red light will indicate that your jHub is being charged properly. The jHub normally takes ~ 4 to 5 hours for a full charge
You will want to first fully charge the jHub Rock prior to using it to charge a device. Use the provided micro USB cable to charge the jHub Rock by plugging it into a USB power adapter and the other end into the micro USB port located on the jHub Power Rock. *When charging your jHub Rock , approximately 20% to 35% of the external battery’s capacity will be consumed due to power lost from heat produced by circuit, the conversion of the voltage and the cable charging/your device. Industry average is currently 35% for the efficiency rate.