HCY 702030 3.7V 500mAh 25C Lithium Polymer LiPo Pouch Cell Battery with 2-Pin Connector

1. Product Overview

The HCY 702030 3.7V 500mAh 25C Lithium Polymer battery is a compact rechargeable LiPo pouch cell designed for lightweight portable electronics and applications that require relatively high discharge capability.

The actual battery is marked HCY 702030, 3.7V, 500mAh and 25C. Based on its nominal voltage and capacity, the battery stores approximately 1.85Wh of energy.

Its compact pouch construction, flexible wire leads and pre-fitted 2-pin connector make it suitable for compatible RC equipment, small drones, robotics and DIY electronic projects.

2. Electrical Specifications

• Brand: HCY
• Model / Size Code: 702030
• Battery Chemistry: Lithium Polymer (LiPo)
• Cell Configuration: 1S / Single Cell
• Nominal Voltage: 3.7V
• Rated Capacity: 500mAh / 0.5Ah
• Rated Energy: 1.85Wh
• Discharge Rating: 25C, as marked on the battery
• Rechargeable: Yes
• Output: Red (+) and Black (-) wires
• Connector: Pre-fitted 2-pin connector

The 1.85Wh energy rating is calculated from:

3.7V × 0.5Ah = 1.85Wh

3. Physical Specifications

• Battery Type: Flat Lithium Polymer pouch cell
• Nominal Size Code: 702030
• Approx. Nominal Cell Dimensions: 7 × 20 × 30 mm
• Positive Wire: Red
• Negative Wire: Black
• Connector: 2-pin plug
• Construction: Flexible aluminium-laminate pouch

Understanding the 702030 Size Code

The size code generally represents the approximate bare-cell dimensions:

• 70 → approximately 7.0 mm thickness
• 20 → approximately 20 mm width
• 30 → approximately 30 mm length

The finished battery may be slightly larger due to the protection/interface section, insulation, wires, connector and manufacturing tolerance.

4. 25C High-Discharge Design

The battery is marked 25C, indicating that it is intended for applications requiring higher discharge capability than ordinary low-current LiPo pouch cells.

This makes it suitable for compatible applications such as:

• Mini drones
• RC helicopters
• RC aircraft
• RC toys
• Robotics
• Small motor-driven projects

The 25C marking should not be treated as a guaranteed continuous current specification in amps unless the exact HCY manufacturer datasheet confirms the permitted current and operating conditions.

5. Suitable Applications

The HCY 702030 battery may be suitable for compatible:

• Mini drones and quadcopters
• RC helicopters
• RC aircraft
• RC toys
• Robotics projects
• Portable electronic equipment
• DIY electronics
• Battery-powered prototypes
• Small embedded systems

Compatibility depends on the device’s voltage, current requirement, connector, polarity and available physical space.

6. Charging & Usage

This is a single-cell 3.7V LiPo battery and must be charged using a charger specifically designed for 1S Lithium-ion / Lithium Polymer batteries.

Before use:

• Confirm correct polarity
• Confirm connector compatibility
• Use a suitable 1S LiPo charger
• Do not connect directly to an unsuitable power supply
• Do not exceed the battery manufacturer’s permitted charging or discharge limits
• Check that the equipment’s current requirement is suitable for the battery

7. Advantages of LiPo Pouch Cells

• Compact and lightweight construction
• Flat form factor for space-constrained devices
• Rechargeable
• High energy density
• Suitable for portable electronics
• High-discharge versions suitable for motor-driven applications
• Easy integration using flexible wire leads

8. Compatibility Note

Before ordering, compare your existing battery for:

• Nominal voltage: 3.7V
• Capacity: 500mAh
• Discharge rating: 25C
• Approx. nominal cell size: 7 × 20 × 30 mm
• Connector shape
• Connector polarity
• Wire orientation
• Device current requirement
• Available installation space

The same voltage and capacity do not automatically guarantee compatibility.

9. Safety Note

Lithium Polymer batteries require careful handling.

• Do not puncture or crush the pouch
• Do not bend or deform the cell
• Do not short-circuit the wires
• Do not reverse polarity
• Do not expose to fire or excessive heat
• Do not use a swollen, leaking or physically damaged battery
• Always use a compatible LiPo charger