Official HUINA 7.4V 500mAh Li-ion Battery – SM-4P (4-Pin) Connector

This is an official HUINA factory-supplied 7.4V Li-ion battery with a 500 mAh capacity, designed for lighter-duty HUINA RC construction models.
 
The battery uses a single SM-4P (4-pin) locking connector, with power delivery and charging handled through the one plug — no separate balance lead required.
 
As a factory-original HUINA battery, it provides the correct voltage, wiring layout, and connector configuration required by HUINA electronics, with no adapters or modifications needed.
 
Specifications
Brand: HUINA (OEM)
Battery type: Li-ion
Voltage: 7.4 V (2S)
Capacity: 500 mAh
Connector: SM-4P (4-pin, locking)
Balance lead: None (integrated via main connector)
Condition: New, factory original
 
HUINA RC models that use a 7.4 V Li-ion battery with an SM-4P connector.
 
Official HUINA factory battery — not an aftermarket or “compatible” copy.