Please note that these batteries are on the large side due to a larger than normal cell.  We have optimized the assembly size as much as possible and are confident it matches or is smaller than any other protected cell of this capacity but please verify the size below will fit into your device before ordering.  The customer will be responsible for any shipping costs if returning a cell because of the size being within the specification but too large for the customer application.

Compatible with 3.7V

Some companies market batteries like this as 3.7V 3500mAh, this will replace any 3.7V lithium ion with no issue.  3.7V vs 3.6V is just a labeling difference and is not an actual voltage difference inside the battery.

All protected batteries are not the same - the Liion Wholesale version is the best protected 18650 on the market

These are manufactured with a very high quality PCB including a Japanese Ricoh protection IC with three FNK MOSFETs for 20A high current cutoff (most PCBs will not be able to handle this much current).   This protection circuit protects the battery from mishandling, overcharge, or overdischarge while allowing the battery to do its job properly.

The cell is made by a high quality cell manufacturer.  Our company then adds the high quality PCB along with the button top in an ISO certified factory to all safety standards.  A silver wrap is put over the top to hold it together.

Please note that these batteries have a UN38.3 test report available and are legal for shipping.  Many protected batteries on the market actually do not have any test data and are likely illegal for shipping due to lack of UN38.3 test report.  Many competitors don't realize that a separate test needs to be done on the battery assembly and that the cell test is not enough.  All of our batteries include a UN38.3 report available upon request.

Protected 4000mAh 5A 18650 Button Top Specifications:

• Style: BUTTON top
• Dimensions (including button): 19mm max diameter x 69.7mm max length
• Brand: Liion Wholesale
• Manufacturer Rated Nominal Capacity: 4000mAh
• Manufacturer Rated Minimum Capacity: 3850mAh
• Manufacturer Rated Max Discharge Current: 5A
• Nominal Voltage: 3.6V (compatible with 3.7V)
• Full Charge Voltage: 4.2V
• PCB Protection: YES  
• Protection IC:  Ricoh
• MOSFETS:  Quantity 3 
• Origin: Cell made in China, Battery assembled in China, Protection IC made in Japan
  
• Battery Assembly Certifications:  UN38.3 test report

Priced per battery, not per pair.

Receive free battery cases with your purchase! (up to 24 batteries, click to read our updated case policy.)

We don't sell bogus batteries. When buying from LiionWholesale, you can rest assured that we only work with top tier manufacturers to bring you the best, most reliable, trustworthy batteries that will perform above and beyond your expectations. And we test every shipment to ensure consistent quality.