High-capacity 21700 lithium-ion battery with stable 3.6V output and 4000mAh for extended runtime
Premium battery case made of reinforced ABS plastic with precise CNC molding for secure fit and impact resistance
Optimized for high-drain power tools, electric vehicles, and industrial equipment requiring consistent performance
Advanced cell structure ensures low internal resistance and minimal heat generation during heavy use
Compact 21700 size (21mm diameter) with space-saving design for versatile integration into DIY projects
Includes corrosion-resistant nickel-plated contacts for reliable conductivity and reduced voltage drop
Certified safe with built-in overcharge/discharge protection and thermal stability up to 60°C
Ideal for professional cordless drills, LED work lights, and portable medical devices needing durable power solutions






Recent Purchase
njh***
Nominal Voltage:3.7v;Nominal Capacity:5000mAh;Battery Type:cylindrical;
$167.44
4 days ago
kgd***
Nominal Voltage:3.7v;Nominal Capacity:5000mAh;Battery Type:cylindrical;
$59.80
19 days ago
mhi***
Nominal Voltage:3.7v;Nominal Capacity:5000mAh;Battery Type:cylindrical;
$155.48
35 days ago
tys***
Nominal Voltage:3.7v;Nominal Capacity:5000mAh;Battery Type:cylindrical;
$167.44
31 days ago
wbc***
Nominal Voltage:3.7v;Nominal Capacity:5000mAh;Battery Type:cylindrical;
$167.44
12 days ago
hyp***
Nominal Voltage:3.7v;Nominal Capacity:3400mAh;Battery Type:cylindrical;
$88.80
1 day ago
rdr***
Nominal Voltage:3.7v;Nominal Capacity:3400mAh;Battery Type:cylindrical;
$124.32
22 days ago
nyq***
Nominal Voltage:3.7v;Nominal Capacity:3400mAh;Battery Type:cylindrical;
$150.96
40 days ago
hwr***
Nominal Voltage:3.7v;Nominal Capacity:3400mAh;Battery Type:cylindrical;
$53.28
17 days ago
yad***
Nominal Voltage:3.7v;Nominal Capacity:3400mAh;Battery Type:cylindrical;
$26.64
26 days ago
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Customer Reviews
Average Rating
5.0





5.0
3 global ratings
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Recent
1***m

Helpful (3)
I love all of my items, the quality is perfect especially for the price. All my items arrived on time. Love OKWISHING
Jan.20.2025

Helpful (3)
Jan.20.2025
1***m

Helpful (3)
Los pedidos frecuentemente llegan antes del tiempo o en el tiempo indicado. Me gusta ser su clienta.
Feb.28.2025

Helpful (3)
Feb.28.2025
1***m

Helpful (2)
Bonne qualité en général, et formes et couleur introuvables ailleurs
Feb.28.2025

Helpful (2)
Feb.28.2025
- 1
21700 40P lithium ion battery 21700 3.6V 4000mah battery case 21700 holder case for Power Tools
$7$8.88-21.17%
Nominal Voltage:
3.7v
Nominal Capacity:
3400mAh
5000mAh
Battery Type:
cylindrical
Quantity:
Add to Cart
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