The BYD FC4680P cell is a Lithium Iron Phosphate chemistry in the Tesla 4680 cell format.

4680 => 46mm in diameter and 80mm high

A small plug in the top is described as an “explosion proof valve”.

Independently measured values shown in bold

Key features

  • LFP
  • Gravimetric energy density = 129Wh/kg (measured at 147 Wh/kg)
  • Volumetric energy density = 350Wh/litre (measured at 370 Wh/L)
  • Nominal Capacity = 15Ah (0.5C charge / 0.2C discharge)
    • Typical capacity = 15.3Ah
    • Measured capacity = 15.3 Ah (CCCV 5A to 3.65 V, 0.25 A cutoff, 5A discharge to 2.8 V)
  • Nominal Voltage = 3.2V
  • Nominal Energy = 48Wh (measured at 49.2 Wh)
  • Maximum voltage = 3.65V
  • Cutoff voltage = 2.0V
  • Maximum continuous discharge = 45A
  • Maximum charge = 15A
  • Operating temperature range
    • Charge = 0°C to 55°C
    • Discharge = -20°C to 60°C
  • Storage temperature range = 1 year at -20°C to 25°C
  • Cycle life = 2000 cycles to 80% SoH at 1C/1C and room temperature


  • Diameter = 46.3 +/-0.25mm
  • Height = 80.2 +/-0.3mm
  • Mass = 0.335kg

Safety Data

Data as shown on manufacturers specification sheet.

External Short CircuitNo explode, No fire
OverchargeNo explode, No fire
Forced DischargeNo explode, No fire
VibrationNo leakage, No fireexplosion proof valve does not open
Temperature Cycling
Low PressureLiquid tight, No fireexplosion proof valve does not open
Nail Penetration
External Heat
DropNo leakage, No fire

This post has been built based on the support and sponsorship from: Eatron TechnologiesAbout:EnergyAVANT Future MobilityQuarto Technical ServicesTAE Power Solutions and The Limiting Factor. 

Future Roadmap

BYD’s FinDreams roadmap for this cell shows that it is not a one off cell where they are playing with LFP chemistry in the 4680 format.

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