Nitecore F4 Charger/Power Bank: Review & Test

Nitecore F4 Gearbest - https://bit.ly/2NvTWkZ
F4 Amazon UK - https://amzn.to/2Xu0Rvo USA -https://amzn.to/2Y3eKA6
The new F4 charger and power bank from Nitecore, fits up to 4 18650 cells (protected and unprotected cells)
I test the F4 to see how it performs, what the good/bad points are and if it might be a viable option for some users.

Sample supplied via Nitecore for unbiased testing and review
Details from the maker:
Specification:
Input DC 5V 2A
Output Voltage (Battery) 4.2V±1%
Output Voltage (USB) 5V±5%
Output Current (Battery) 2*1A, 4*0.5A
Output Current (USB) 2*2A
Compatible with Li-ion/IMR: 18650
Dimensions L-4.46"xW-3.39"xH-1.06"
Weight 4.32oz

Features:
-Battery charger and Power bank
-Single-slot max charging current of 1A
-Single USB port max output current of 2A
-4 slots controlled independently
-LCD real-time display, with charge rate and capacity

Package Included:
1xNITECORE F4 battery charger & power bank
1xMicro-USB power cord