• live chat
      If you are considering a purchase

      Chat with Online Sales for more information before you purchase!

      If you already made a purchase

      Contact Customer Service for order status and other after-sales issues.

      Submit a Request

IJOY INR 21700 3.7V 3750mAh 40A Rechargeable Li-Ni Battery


Be the first to review this product

  • Availability:

    Out of stock

    • Quantity
    • Price
    • 2--3
    • $16.65
    • 4--5
    • $16.32
    • 6-- More
    • $15.99
Product Description:

IJOY 21700 battery is another amazing battery after IJOY 20700 battery which features fantastic battery life and high discharge rate with 3750 mAh rated capacity and 40A continuous discharge maximum. 



Size 21700
Type Li-Ni (High Drain)
Typical Capacity 3750mAh
Min Capacity 3700mAh
Nominal Voltage 3.7V
Peak Voltage 4.2V
Cut-off Voltage 2.5V
Dimensions  21.4mm (Diameter) x 70.2mm (Length)


Max Continuous Discharging Current 40A
Max.Charge Voltage 4.23V
Style Flat Top
Color Black and Gold
Rated Capacity 3750mAh

Package content:

1* IJOY INR 21700 3.7V 3750mAh 40A Rechargeable Li-Ni Battery 

Detailed Introduction:


Temperature range: -20 to +60 Degree Celsius

Monthly Self-discharge rate: Less or equal 0.5%

Temperature range: Discharge: -20 to +60 Degree Celsius, Charge: 0 to 45 Degree Celsius



Fully charge before first use.

Never short (connect positive and negative size) battery.

Keep them always in battery case, or any other insulating material.

Never keep this battery together with metal objects (short circuit can happen if you do).

Never carry bare cell in your pocket with keys, change or any other metal objects.

Customer Reviews

Write Your Own Review