Product Review

The F2 Flex is Nitecore's first outdoor battery charger & Power Bank. Perfect for charging a cell phone, camera, or even portable gaming system/tablet! Lightweight and durable, this power bank & charger is ideal for backpacking, travel, outdoor photography & is the perfect charger for the rugged nature-lovers out there.

Specifications
Input: DC:5V ≥0.5A (USB compatible)
Output voltage: 4.2V±1% (Battery) / 5V±5% (USB)
Output current: USB 2A MAX Battery: 2×1A MAX
Compatible with: Li-ion / IMR: 26650 / 18650 / 17670 / 18490 / 17500 / 17335 / 16340 / (RCR123) / 14500 / 10440
Dimensions: 3.7" ×1.73" ×0.98"(94mm×44mm×25mm)
Weight: 1.64oz (46.5g,without power cord)

Features
Compatible with cylindrical rechargeable Li-ion batteries of various sizes
Intelligent USB charging and regulation control circuit
Battery charging and discharging capability
Universal micro-USB 3.0 input port, accelerated charging rate up to 1A each bay
USB output up to 2A
Charge two batteries simultaneously and independently
Built-in power indicators display battery status
Automatic power detection and voltage reporting upon battery installation
Optimized IMR battery charging
Automatic identification for batteries of different types and proceed with appropriate
charging current and mode
Reverse polarity protection and anti-short circuit protection
Made from fire retardant PC materials
Optimal heat dissipation design
RoHS, CE, FCC and CEC certified