products details

Home > Products >

Full Tab Cylindrical Cells

Grade A Tenpower INR21700-50SG Lithium Battery 5000mAh 20A High Discharge UN38.3 Certified 21700 Cell

All Category

Semi Solid State Power Bank

Miss. Molly

molly@huajinhk.com

+86 18312003857

Contact Now

Grade A Tenpower INR21700-50SG Lithium Battery 5000mAh 20A High Discharge UN38.3 Certified 21700 Cell

Brand Name:	Tenpower
Model Number:	INR21700-50SG
MOQ:	130
Price:	$1.8
Packaging Details:	130pcs/Carton box
Payment Terms:	T/T

Detail Information

Product Description

Ratings & Reviews

Detail Information

Place of Origin:

China

Certification:

UN38.3/CE/UL/IEC62133/KC/BIS

Document:

Key Feature:

Ultra-low Internal Resistance, High Rate Capability, Low Temperature Rise

Low Impedance:

Max 5MΩ

Applications:

Electric Tools,Cleaning Appliances, Drones, E-bike

High Discharge Rate:

Max 36A

Highlight:

Ampace JP30P1 18650 Li-ion Battery, 3000mAh 3.68V 18650 Li-ion Battery, 3000mAh 3.68V Full Tab Cylindrical Cells

Supply Ability:

500K/Month

Highlight:

21700 lithium battery 5000mAh

INR21700-50SG 20A high discharge

UN38.3 certified 21700 cell

Product Description

Grade A Tenpower INR21700-50SG Lithium Battery 5000mAh 20A High Discharge UN38.3 Certified 21700 Cell

The INR21700-50SG 21700 lithium-ion power cell delivers exceptional sustained power & long cycle life for your energy storage builds. Boasting a 5000mAh large capacity and a 20A continuous discharge rating, this rechargeable cell maintains steady voltage output under heavy loads.

Unlike generic 21700 cells, it features consistent performance and low internal resistance, making it a premium pick for medium & high-power projects. Perfect for DIY battery packs, home energy storage, power stations and off-grid systems, ensuring reliable energy supply and longer runtime.

Cell Characteristics

Specification	Value
Capacity	Typical 5000mAh (18Wh) Minimum 4900mAh (17.64Wh)
Cell Voltage	Nominal 3.6V Charge 4.2V Discharge 2.5V
Continuous Charge Current	Standard 2.5A Maximum 6A
Continuous Discharge Current	Maximum 20A
Ambient Temperature	Charge 0～45℃ Discharge -20～60℃
Impedance	≤14mΩ (25±3℃)
Weight	71g
Dimension	70.80mm(Max) * 21.35mm(Max)
Cycle life	500cycle(70%)

Key Features

High Capacity: 5000mAh provides extended runtime before requiring recharge
High Discharge Rate: 20A continuous discharge, ideal for medium-to-high-drain applications
Lithium-Ion Chemistry: Provides stability, efficiency, and low internal resistance
Rechargeable & Long-Lasting: Supports multiple charge cycles with minimal degradation
Output Stability: Stable voltage curve during discharge ensures continuous power output
Compact 21700 Size: Universally compatible with a wide range of electronic devices
Applications

Flashlights: Ideal for high-lumen LED torches requiring consistent power
Medical Devices: Reliable power source for essential equipment
Power Banks & Backup Systems: Supports portable energy solutions
Lightweight Power Equipment: Auxiliary power for robotic vacuums, electric bicycles, scooters, and fishing boats
Power Tools: High burst power for drills, angle grinders, electric saws, and other high-current tools

Warning

Lithium-ion batteries require proper handling and knowledge to ensure safe operation
Failure to follow safety guidelines may result in fire, explosion, serious injury, or property damage
Only purchase and use if you fully understand lithium-ion battery safety
Never leave a battery unattended while charging
Keep away from animals and children
Prevent contact with metal objects to avoid short circuits
Inspect wraps and insulators regularly for damage - repair or dispose of damaged batteries immediately
Resellers must pass these warnings to customers
Typical cycle life of 200-500 cycles before noticeable capacity reduction - recycle at end of life
Do not crush, incinerate, or modify batteries
Only use within manufacturer specifications

Ratings & Review

Overall Rating

5.0

Based on 50 reviews for this product

Rating Snapshot

The following is the distribution of all ratings

5 stars

100%

4 stars

3 stars

2 stars

1 stars

All Reviews

Kit

Germany Aug 13.2026

trustpilot.com

Helpful (4357)

Good capacity and stable performance. Ideal for energy storage builds. Happy with the purchase!

Tags:

18650 Cylindrical Cells

21700 Cylindrical Cells

Full Tab Cylindrical Cells

LiFePO4 Prismatic Cells

12.8V LiFepo4 Battery

25.6V LiFepo4 Battery

Home Energy Storage Batteries

LiFePO4 Cylindrical Cells

Semi Solid State Power Bank

18650 Cylindrical Cells

21700 Cylindrical Cells

Full Tab Cylindrical Cells

LiFePO4 Prismatic Cells

12.8V LiFepo4 Battery

25.6V LiFepo4 Battery

Home Energy Storage Batteries

LiFePO4 Cylindrical Cells

Semi Solid State Power Bank

products details

18650 Cylindrical Cells

21700 Cylindrical Cells

Full Tab Cylindrical Cells

LiFePO4 Prismatic Cells

12.8V LiFepo4 Battery

25.6V LiFepo4 Battery

Home Energy Storage Batteries

LiFePO4 Cylindrical Cells

Semi Solid State Power Bank

Grade A Tenpower INR21700-50SG Lithium Battery 5000mAh 20A High Discharge UN38.3 Certified 21700 Cell

21700 lithium battery 5000mAh

INR21700-50SG 20A high discharge

UN38.3 certified 21700 cell

Overall Rating

Rating Snapshot

All Reviews

21700 rechargeable li ion battery

5000mah lithium ion battery

18650 Li-ion Battery