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Custom Polymer Li-Ion Battery Pack: 3.7V 530mAh (1.96Wh, 1A rate, 503035-2C) - UN38.3 Passed

Molex Connector (51021-0300)
Molex Connector (51021-0300)Option 2: with JST Connector Option 3: with JST PH Connector
Your Price: $17.95
Lead Time: TBC

Product Options

Connector Option:


Update Specification updated on Jan 8th, 2020
Battery       Made of 1x Polymer Li-Ion 503035-2C cells
Voltage       Nominal: 3.7V; Max.Charge Voltage: 4.2V; Discharge Cut off: 2.8V
Capacity       Nominal: 530mAh
Terminal Options
  •  CU-N239: Charge/Discharge Terminals: 3" 28AWG wires with Molex Connector (51021-0300)
    • Pin 1 = Batt - and thermistor
    • Pin 2 = Thermistor
    • Pin 3 = Batt +
  • CU-N239-V1: Charge/Discharge Terminals: 3" 24AWG wires with JST-EH-3P connector
    • Pin 1 = Batt +
    • Pin 2 = Thermistor
    • Pin 3 = Batt - and thermistor
  •  CU-N239-V2: Charge/Discharge Terminals: 3" 24AWG wires with JST PH Connector
    • PHR-3 and terminal SPH-002T-P0.5S)
    • Pin 1 = Batt + red wire. 
    • Pin 2 = White wire NTC thermistor. 
    • Pin 3 = Black wire GND.,
Cycle life      > 300 times
Charge Current      Standard: 0.2C/ 104mA; Max: 1C/ 500mA
Discharge Current      Standard: 0.2C/ 104mA; Max: 2C/1000mA
Dimensions(LxWxH)       43mm(1.7")  x 32.0mm(1.26")  x 5.4mm(0.21")  
Weight      0.4oz (10 grams) 


  • Li-Ion battery may explode if misused.  We are not responsible for any damages or losses caused by misuse (including but not limited to: improperly charging/discharging, any changes of this battery pack, disassembling battery packs).
  • Always charge battery with attention.  Battery pack should be placed in a fireproof place to avoid any accidents.
  • Please check battery polarity before connect to device
  • Please read more safety warning about Li-ion battery
  • California residents: Warning: Cancer and Reproductive Harm - See Prop 65 Warnings

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