F21i 21700 Fast Charging Power System

The Nitecore F21i turns your iSeries battery such as NL21500HPi into a minimalist battery charger and power bank. The F21i features a USB-C port that functions both as a battery charger when connected to a power adapter and as a power bank when connected to a device. The 3-dot blue indicator beneath the USB port flashes to indicate the charging progress. Supporting Quick Charge and Power Delivery (QC, PD) protocols, F21i delivers an incredible 18W of fast charging output. The F21i is a mini multi-functional battery charger and power bank as well as a must-have backup battery and accessory for any iSeries tactical flashlight. 

Features:

• Dual Way Fast Charging Power System for 21700 i Series Batteries
• 18W USB-C dual way fast charging available with QC, PD and more protocols
• Automatic detection on the USB devices to be used as a power bank
• Power indicators can indicate the remaining battery power
• Mechanical polarity reverse protection
• Multiple protection safeguards including overcharge, over-discharge, overcurrent protections and more
• Body made from lightweight and fire retardant PC materials
• Elastic band made from durable, corrosion and heat resistant EPDM rubber
• Custom 21700 i Series Battery:
  • Model: NL2150HPi
  • Capacity: 5000mAh
  • Voltage: 3.6V
  • Discharge: 15A
  • Note: Fits only for i-series flashlight like Nitecore i4000R, P10i, P20i, P30i, P10iX, P20iX, P20i UV Flashlight. This is a custom battery. 
• F21i:
  • USB-C：5V⎓2A / 9V⎓2A
  • Battery: 4.2V⎓15A (MAX)
  • USB-C: 5V⎓2.4A / 9V⎓2A / 12V⎓1.5A
  • Size: Diameter 27.4mm, Height 112.5mm (with battery)
  • Weight: 22g