products details

Home > Products >

Full Tab Cylindrical Cells

21700 Battery Supplier China BAK 50D Lithium Ion Battery 5050mAh 50A Discharge Long Full Tab High Capacity

All Category

Semi Solid State Power Bank

Miss. Molly

molly@huajinhk.com

+86 18312003857

Contact Now

21700 Battery Supplier China BAK 50D Lithium Ion Battery 5050mAh 50A Discharge Long Full Tab High Capacity

Brand Name:	BAK
Model Number:	50D
MOQ:	130
Price:	$2.7
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:

INR2170-50D specification.pdf

Terminal Type:

Full Tab

Key Feature:

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

Low Impedance:

Max 6MΩ

Applications:

Electric Tools, Cleaning Appliances, E-bike

High Discharge Rate:

Max 50A

Highlight:

5050mAh 50A 21700 Lithium Ion Battery, BAK 50D 21700 Lithium Ion Battery, 5050mAh 50A 21700 Lithium Ion Cells

Supply Ability:

500K/Month

Highlight:

21700 5050mAh lithium ion battery

BAK 50D 50A discharge cell

full tab cylindrical battery

Product Description

21700 Battery Supplier China BAK 50D Lithium Ion Battery 5050mAh 50A Discharge Long Full Tab High Capacity

The 50D 21700 lithium-ion power cell is engineered for extreme high-current output and dependable energy storage performance. Featuring 5050mAh large capacity paired with an impressive 50A max continuous discharge, this rechargeable cell maintains rock-solid voltage stability even under heavy peak loads.

Compared with standard 21700 cells, it adopts low internal resistance design and superior consistency, minimizing heat build-up during high-current operation. Perfect for heavy-duty high-power projects, delivering sustained power and longer runtime for your battery pack builds.

Cell Characteristics

Specification	Value
Capacity	Typical 5050mAh (18.18Wh) Minimum 5000mAh (18Wh)
Cell Voltage	Nominal 3.6V Charge 4.2V Discharge 2.5V
Continuous Charge Current	Standard 2.5A Maximum 15A
Continuous Discharge Current	Standard 1A Maximum 50A
Ambient Temperature	Charge 0～45℃ Discharge -20～60℃
Impedance	≤6mΩ
Weight	69g
Dimension	70.75mm(Max) * 21.45mm(Max)
Cycle life	600cycle(60%)

Key Features

Extremely Low Internal Impedance: The full-tab structure shortens the current collection path, delivering much lower internal resistance than conventional cells.
Excellent Thermal Management: The uniform current distribution results in low and even heat generation
High Capacity: 5050mAh large capacity for longer runtime between recharges
High Discharge Rate: 50A continuous discharge, ideal for 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: Flat voltage curve under discharge to maintain steady continuous power supply
Compact 21700 Size: Standard 21700 size, widely compatible for custom battery pack assembly & electronics

Applications

Aerospace: Provides lightweight, high-energy-density batteries for spacecraft, drones, UAV, and model aircraft
Robotics: Supplies continuous power for high-load robots
Lightweight Power Equipment: Assists with power for electric motorcycles, snowmobiles, electric bicycles, and other lightweight power tools
Power Tools: Delivers high burst power for drills, angle grinders, electric saws, blow dryers, and other high-current tools
Cleaning Appliances: Provides stable and lasting power for vacuum cleaners, mite removers, floor washers, steam mops, garden tools, and more, ensuring work efficiency and long battery life.
Medical Electronics: Provides highly reliable power for life monitors, portable medical devices, and more

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 supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

100%

4 stars

3 stars

2 stars

1 stars

All Reviews

Modeste

Ireland Sep 28.2026

trustpilot.com

Helpful (2648)

They look great and are very practical to use. The quality is impressive, and they’re a great choice for my projects. Overall, a lovely product that does exactly what I need. Very happy with my purchase!

Gabriell

Germany Sep 12.2026

trustpilot.com

Helpful (7543)

I tested these 50D 21700 cells with my battery tester. Both capacity and voltage readings match the specs perfectly. Low heat even under high 50A discharge. Great consistency for my DIY energy storage pack. Highly recommended.

A*u

Germany Nov 7.2025

trustpilot.com

Helpful (48)

The packaging was good, nothing was damaged. I waited for over a month to receive the goods, and the battery cells are good.

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

21700 Battery Supplier China BAK 50D Lithium Ion Battery 5050mAh 50A Discharge Long Full Tab High Capacity

21700 5050mAh lithium ion battery

BAK 50D 50A discharge cell

full tab cylindrical battery

Overall Rating

Rating Snapshot

All Reviews

21700 rechargeable li ion battery

5000mah lithium ion battery

18650 Li-ion Battery