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


Shopper Award
Security Verified Seal

Custom LiFePO4 26650 Battery: 6.4V 3300mAh (21Wh, 3.5A rate, 2S/S, 26650-3300)

Your Price: $35.25
In Stock

Product ID # 10252
Part Number:

Lead Time: 5 Business Days!


*Important Shipping Regulation This pack is for testing (prototype) only. It has not been UN38.3 tested yet.  Read more...
Voltage 6.4 V (working)   7.6 V (peak)  5.0 V ( cut-off)
Capacity 3300 mAh (21Wh)
Prewired Charging/Discharging Terminals: 3 x 3.0" 20AWG open end wires
  • Red (+)
  • Black (-)
  • Green or Blue (NTC)
  • 1 x  PCB (8A limited) installed with the  battery pack and protects the battery from
    • Overcharge       (>7.7V)
    • Over discharge  ( <4.46 V)
    • Over drain ( >8 Amp)
    • Short circuits
  • 1 x 3.5A Polyswitch installed to limit current at 3.5A and to protect wrong polarity
  • 1 x 10K NTC
Cycle Life   > 1000 cycles (80% of initial capacity @ 0.2C rate, IEC Standard) 
Charging rate 3.5A Max Limit by Polyswitch
Max. Discharging Rate 3.5Amp limited by polyswitch
Dimensions(LxWxH) 55mm(2.2") x 68mm (2.3") x  28mm(1.1")
Weight 6.4oz (350grams)


Please click Knowledge on LiFePO4 battery to learn more detail
California residents: Warning: Cancer and Reproductive Harm - See Prop 65 Warnings

Related Products

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