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6.6V 4000mAh 2S LiFe Receiver Battery: Universal Receiver, EC3
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Application: Receiver Pack
Balance Lead Length: 1.97 in (50mm)
Battery Balance Connector: JST_XH
Battery Voltage: 6.6V
Capacity: 4000mAh
Cell Configuration: 2S1P
Connector Type: EC3,Universal
Discharge Lead Length: 5.91 in (150mm)
Height: 1.54 in (39mm)
Length: 2.87 in (73mm)
Maximum Charge Current: 4.0A
Maximum Continuous Discharge Rate: 20C
Maximum Current: 80A
Minimum Discharge Voltage: 5.0 V (2.5 V per cell)
Normal/Standard Charge Current: 800mA
Normal/Standard Charge Rate: 1C
Watt Hours: 26.4 Wh
Weight: 235 g (8.2 oz)
Width: 1.89 in (48mm)
Wire Gauge: 16 AWG

Battery Safety Sheet


Will my JR receiver battery work with other systems?

Yes, JR receiver batteries have a universal type connector and is compatible with most current radio systems.

Can a battery be used after it was charged with polarity reversed?

This depends on the age and condition of the battery, performance may be lessened. Contact JR's Service Center if you're unable to determine the condition of your battery.

Does a JR receiver with a Futaba transmitter?

No. they are not compatible with one another.

Product Support Tips

Product Support

Product Support & Service

Technical questions about this product should be directed to Horizon Hobby:

Horizon Hobby GmbH
Hanskampring 9
D-22885 Barsbuettel

US Product Support:
Mo - Fr: 2:00pm - 9:00pm (UK Time zone hours of operation)
English: +44 (0) 127 929 7061

Europe Customer Service & Tech Support:
Mo - Fr: 8:00am - 4:00pm
English: +44 (0) 127 929 7061
German: +49 (0) 40-822167800
French: +33 (0) 7 822 63 500

To contact Tech Support email us at service[at]

If you would like to purchase this product at a local retailer please visit our Store Locator.