21700 Lithium-ion Rechargeable Cell - 4200mAh 3.7V 30A

This is a quality 3.7V 21700 rechargeable lithium-ion battery with a 4200mAh capacity and up to 30A discharge. We're stocking this less-familiar format to accompany some incoming products that require these larger 21700 cells (vs the more common 18650 format).

We only source these batteries from our trusted UK battery supplier due to their careful testing ensuring each cell is EU/UK regulation and RoHS compliant. Each cell has clear polarity marking and comes in its own individual plastic storage tube for added safety and protection.

These 21700 cells are the unprotected type, meaning you'll need to ensure you use them with a device that provides protection such as reverse polarity protection, overcharge/discharge protection, over current protection and short circuit protection. If you're not sure what this means, you shouldn't be buying this battery - safety first!

Lithium Battery Shipping: Due to courier restrictions, this product can only be shipped within England/Wales. With this item in your cart, your shipping options will be limited to DHL. Why?

Specification

• Size: 21700
• Nominal Capacity: 4200mAh
• Nominal Voltage: 3.7V
• Discharge: 30A Max Continuous
• Positive: Flat
• Protected: No
• Rechargeable: Yes
• Dimensions: 21mm x 70mm
• Weight: 65g
• Model number: Molicel INR-21700-P42A

Lithium Care

Important! Lithium batteries require careful storage and usage, and must only be charged/discharged within the ratings listed. Please only consider purchasing this item if you have the knowledge and equipment to use and maintain these batteries properly. If you accidentally damage (bend/pierce/crush/dent) these batteries, stop using them immediately and dispose of them safely and responsibly.

• Never carry loose cells – they should be suitably cased at all times when not in use
• Do not short batteries with metallic objects such as keys or loose change
• Always use a battery charger or circuit board charging module designed for Lithium-Ion cells
• Never leave a battery charger unattended
• Never completely discharge batteries
• All batteries should be checked for damage regularly
• Do not expose to extremes of heat or cold, or sudden fluctuations between the two
• Always dispose of end-of-life cells at your local WEEE recycling centre

Resources

• Datasheet
  

Package Contents

• 1x 21700 Lithium-ion Rechargeable Cell - 4200mAh 3.7V 30A
• 1x Case