***WARNING BATTERIES CAN ONLY BE SHIPPED VIA GROUND***batteries also ship with 30% charge or less per HAZMAT restrictions.

Capacity:

Rated: 4000 mAh
Typical: 4200 mAh
(see below for definitions)
Does not fit LILYGO 18650 holders, see our Sanyo 18650 instead
Not advised for e-cig or vape

Exceptional cold weather performance. Low temperature operation down to -40°C

Specifications:

• Included-
  
• 2 batteries (2 pack as shown in picture)
  

• Manufacturer:
  • Molicel
• Model:
  • INR-21700-P42A
• Size:
  • 21700
• Style:
  • Flat Top
• Protected:
  • NO, UNPROTECTED. This cell is unprotected and intended for use in protected battery packs only and NOT individually or as a standalone product. In order to operate safely it must have additional protection in the form of a PCB (protection circuit board) or BMS (battery management system), which is not included.
• Nominal Capacity:
  • 4200 mAh, typical
• Discharge Current:
  • 45A Maximum Continuous
• Nominal Voltage:
  • 3.6V
• Maximum Voltage:
  • 4.2V
• Approximate Dimensions:
  • 21.40mm x 70.00mm
• Approximate Weight:
  • 70g
• Origin:
  • Taiwan
• Specification Datasheet
  

Rated Capacity:

This is the total amount of charge a battery can store as determined under controlled conditions, usually specified by the manufacturer. It's often measured under ideal conditions with a specific discharge rate, temperature, and cutoff voltage. The rated capacity is usually determined using standard testing procedures that might not perfectly replicate everyday usage but provide a consistent basis for comparing different batteries.

Typical Capacity:

This term is less formal and is often used to describe the battery capacity that a user can expect under normal usage conditions, which may differ from the controlled conditions used to determine the rated capacity. Typical capacity can take into account more realistic factors such as variable discharge rates, temperature variations, and aging of the battery. It's an estimate of what users might experience more regularly, thus providing a more practical perspective on the battery's performance.

Warranty & Support:

Complimentary Telephone and Email/Live Chat Support (Click Here)
Online Technical Manuals and Instructions (Click Here)

Battery Shipping & Warranty Policy

Sales tax is required in many states and will be added at checkout if applicable to your delivery state. Tax exempt forms can be sent to our support department.

Return Policy: Batteries are non-refundable if used. If you purchased the wrong batteries and have not used them, they can be returned for a refund minus $4 postage fee for the initial shipment (fee is waived if batteries were not purchased with other items or customer purchased expedited shipping). For bulk purchases, see our bulk purchase return policy here.