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


Shopper Award
Security Verified Seal

High Power Polymer Li-Ion Rechargeable Battery Pack: 14.8v 21Ah (311Wh, 20A rate, 1055275-2C)

Your Price: $285.00
In Stock

Product ID # 4273
Part Number:

Lead Time: 5 Business Days

Quantity Discounts

5 to 20$276.45
21 to 50$270.75
51 to 100$265.05
101 or more$256.50
*Important Shipping Regulation This pack is for testing (prototype) only. It has not been UN38.3 tested yet.  Read more...
Battery Pack
  • 14.8 V 21Ah pack is made by 4 pcs  Polymer Li-Ion cell of 3.7V 21Ah
  • Wrapped by heavy duty Heat shrink tube.
  • One PCM (20A) with balance function is installed with the battery pack to protect battery from
    • Overcharging beyond 4.25V/cell
    • Over-discharging below 2.75V/cell
    • Over-drain beyond 20 A
    • Must wait min of 30 minutes after battery is fully charged to allow the pcm to perform balance function on all the cells within the pack.
Voltage       14.8 v (working)   16.8 V ( peak)   11 V ( cut-off)
Capacity       21 Ah   (310.8 Wh)
Energy Density      182.8 Wh/kg
Max. Discharging Rate      20 Amp limited by PCM
Dimensions (LxWxH)      11.0"(280mm) x 2.4"(61mm) x 2.4"(61mm)       
Weight      3.7lb (1700 grams)
Related Products
  • Please never discharge the battery pack beyond its Max. rating
  • Must read here before place an order. Please download fill the form and fax back to 510-439-2808. Attn: BatteySpace-Tech.  We reserve the right to not sell the battery to any one if we feel they cannot handle Li-Ion battery safely
  • For safety warning please see the link here
  • Please allow us to delivery the battery pack in 2-3 weeks after receipt payment because it need to be tested before shipping
  • California residents: Warning: Cancer and Reproductive Harm - See Prop 65 Warnings
  • Limited Warranty: Repair or exchange only within 30 days.

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