21700 size 5000mAh high capacity 15A high discharge rate rechargeable Li-ion battery
– Compatible with “21700 Intelligent Battery System” accessories
– Compatible with the i4000R lens
Revolutionary and Dynamically Upgraded
“i” series of 21700 batteries
(Patent No.ZL201820118916.0 )
As a patent product developed by NITECORE, the 21700i battery series is a rechargeable Li-ion battery that features dual-mode energy output with positive and negative polarity at both ends and high energy density. It enables highly efficient performance by minimizing power loss due to internal resistance.
Excellent energy density.
The 21700i series batteries have an energy density of over 240 mWh/g,
11% higher than 18650 batteries
Unprecedented battery performance
The dual polarities of the 21700i battery series at both ends breaks the convention of connecting the head and tail of the lens in order to reduce its size and weight.
Thus, the internal resistance is extremely reduced to offer a direct energy change to power the device. Due to innovative technology and techniques, more options are offered in design.
It is ideal for devices that require a continuous high discharge current of 15A
Below are some safety features in the battery construction structure:
– Innovative anode design with high temperature resistance
– Pressure relief valve that is activated in the event of a rapid increase in temperature
– Internal protection circuit (PTC) to inhibit large current surges.
– Microporous outer cover protects sensitive internal components
High performance electronic protection circuit:
– Automatically protects against over-charging, over-discharging and short-circuiting
– It incorporates a high quality electronic battery protection circuit
– Incorporates two powerful MOSFETs in the current regulation module for better performance and excellent current.
Below are some external security features:
– It is equipped at both ends with nickel-plated stainless steel protectors that ensure high impact resistance, good electrical conductivity and oxidation resistance.
– Coated with durable metal film for protection against abrasion
– Durable plastic protector of the electronic board.
Low energy costs and environmentally friendly
Using rechargeable batteries is more economical and at the same time helps to reduce the carbon footprint on the planet.
Safe and Reliable
It is insured worldwide as well as approved according to many international standards.
Continuous discharge current: 15A MAX
Weight: 75.5 grams
Length: 76.7 mm ± 0.3 mm
Diameter: 21.9mm ± 0.3mm
Warranty period: 12 months from the date of purchase.
– Never expose the battery to Water or Fire
– When charging or using the battery be sure that the positive and negative poles of the battery correspond to the indications
(+) for the positive pole and (-) for the negative pole of the device
– To extend the life of the battery it is recommended to charge it every 3 months when it remains unused for long periods
– Keep the battery away from children.
Recommended and compatible NITECORE chargers from USB ports are: