Foton Battery INR21700 of 3.6V and 4000mAh

Description

Lithium Ion battery type INR21700-40TG (also known as 21700) Foton™ own brand, industrial type (bulk) and premium quality, used mainly in various assemblies for newer LED flashlights or other devices such as powerbank (external battery), jump starter (car starting robot), hoverboard, electric scooters and bicycles, medical equipment, etc.

This cell model does not have overcharge and deep discharge protection, so it will only be used by specialists, in assemblies with specific protection circuits (BMS). BMS for this type of cell can be found on our website here.

A product tested according to Certificate 1124121067 / 12.02.2025, tests commissioned by Sprinter2000.ro, performed by Shanghai Institute of Chemical Industry Testing Co.Ltd.

TECHNICAL SPECIFICATION:

Brand: Foton™ - Romanian brand since 2005, all rights to the brand belong to Sprinter2000.ro

Product country of origin: China

Manufacturer code: INR21700-40TG

Equivalent codes: 21700, etc

Chemistry: Li-Ion

Type: Rechargeable battery

Nominal voltage: 3.6 V (full charged 4.2V / discharged 2.5V)

Nominal capacity: 4000mAh 14.4Wh

Internal resistance: ≤10mΩ AC (1kHz)

Maximum discharge current: 35 A

Charging voltage: 4.2 V

Charging method: Constant current and voltage

Charging current: standard 2000 mA / maximum 6000mA

Recharge time: standard 3 h / fast charge 1 h

Contacts: Button type, low top terminals

Protection: No protection circuit (BMS) included. DO NOT discharge below 2.5V!

Operating temperature: Charge 0...+50°C / discharge -20...+80°C

Dimensions: diameter Ø 21.3 mm; length 70.3 mm.

Weight: 70 grams

Packaging: industrial bulk (without individual packaging; for industrial use)

Color: Red

Intrastat code: 85076000

CPV code: 31434000-7

Uses: in xSyP battery assemblies (requires protection circuit), electronic equipment and devices. It is NOT recommended for use as such (without installing a protection circuit - BMS) for flashlights and other devices that do not have deep discharge protection (risk of damage in case of deep discharge, not covered by warranty).

Commercial warranty for individuals: Not applicable. Deeply discharged batteries are not covered by the warranty.  

Handling and safety instructions/MSDS: Available at the time of order, request by email.

Test report: 1124121067 / 12.02.2025, tests ordered and paid for by Sprinter2000.ro, performed by Shanghai Institute of Chemical Industry Testing Co.Ltd.

Tests and certifications: UN 38.3 ST/SG/AC.10/11 Rev.8 : Vibration / Short circuit / Temperature / shock, impact, drop from 1.2m / forced discharge

Warnings: Do not overcharge, do not deeply discharge, do not throw into fire, do not short-circuit even after use. Do not throw away - hand over used batteries only to collection centers.