About Payment 
 Shipping & Cost
 Battery SDS
 Battery Terminology
 Battery Knowledge
Privacy Policy
 Export restrictions


Shopper Award
Security Verified Seal

Custom Li-Ion 18650 Battery: 7.2V 5.2Ah (37wh, 5A rate, 2x2L, ICR18650B4)

Your Price: $50.75
In Stock

Product ID # 4291
Part Number:

Lead Time: 5 Business Days

Quantity Discounts

5 to 20$49.22
21 to 50$48.21
51 to 100$47.19
101 or more$45.67

*Important Shipping Regulation

This pack is for testing (prototype) only. It has not been UN38.3 tested yet.  Read more...


Protection Installed PCB  prevent battery pack over charge and over discharge battery,  helps protect battery chemistry integrity and prolongs battery life.
Prewire 6.0" 22 AWG open end wire

Max. charge current

1.0 C  (5.2 A)

Max. discharge current

3.0A continuous

Cut off voltage

5.6 V


5.2" (132mm)L x  1.45" (37mm) W x (0.8" 21mm) H  ( refer to picture )



Related Product


  • Li-Ion Battery may explode if charging or discharging  not properly. User must have the knowledge how to charge and discharge Li-Ion battery before making Li-Ion Battery Pack. Strongly suggest you to use our Universal Smart/Fast  Li-Ion battery charger  to recharge the battery pack  ( Never use conventional DC adapter to charge the battery module ) We are NOT responsible for any damage that is caused by using other brand battery charger.
  • Please download detail specifications  about  18650 batteriesand PCB (5A limited)
  • Please don't modify the battery pack.  Once customer modifys battery pack in any form, we will not take responsible for warranty.
  • We don't suggest anyone to make 5 modules connected in parallel. If you do it, you will take your own responsibility for any damage.
  • We assume that person who purchases the Li-Ion battery or battery pack is professional in Li-ion rechargeable battery, and have full knowledge to Li-Ion properties.  If you don't have enough knowledge for Li-Ion battery,  please don't buy the battery.
  • Must read our battery knowledge: Why Li-ion battery pack has 0 voltage? 

Related Products

Product Reviews

(0 Ratings, 0 Reviews)
What to consider when designing Lithium Batteries?
Bluetooth Technology for Lithium-ion/LiFePO4 Batteries
UN 38.3 Safety Test

We own a national standard UN38.3 testing lab. We can provide UN38.3 test service to our customer.

If you want to set up your own lab, we also provide UN38.3 & IEC62133 equipments and onsite training. Email us for the quote and lead time.
Lithium Battery Shipping Regulation
Recommendations on How to get ≤30% Rated Capacity for Shipping
Thermal Abuse Test for IEC62133
Mailing Lists