HCY 502035 3.7V 1000mAh Lithium Polymer (LiPo) Pouch Cell

1. Product Overview

The HCY 502035 3.7V 1000mAh Lithium Polymer battery is a compact rechargeable LiPo pouch cell designed for portable electronic devices and battery replacement applications.

The battery is marked HCY 502035, 3.7V and 1000mAh. At its nominal voltage and rated capacity, it provides approximately 3.7Wh of energy.

Its flat pouch construction makes it suitable for applications where space is limited and cylindrical cells may not fit.

2. Electrical Specifications

• Brand: HCY
• Model: 502035
• Battery Type: Rechargeable Lithium Polymer / Li-ion Polymer
• Cell Configuration: 1S / Single Cell
• Nominal Voltage: 3.7V
• Rated Capacity: 1000mAh / 1Ah
• Rated Energy: 3.7Wh (calculated from 3.7V × 1Ah)
• Output Leads: Red (+) and Black (-)

The exact maximum charging current and maximum continuous discharge current are not stated on the battery and should not be assumed without the model-specific manufacturer specification.

3. Physical Construction

• Cell Type: Flat pouch cell
• Construction: Aluminium-laminated Lithium Polymer pouch
• Model / Size Code: 502035
• Positive Lead: Red wire
• Negative Lead: Black wire
• Protection PCB: Present on the supplied battery
• Yellow insulating tape protects the PCB and terminal area

Because the photographed battery includes a protection PCB, wiring and insulation tape, its finished dimensions may differ from the bare-cell dimensions associated with a nominal cell code.

4. Protection PCB

A small electronic protection PCB is visibly fitted to the battery.

The board provides an interface between the cell and the red/black output leads. However, the exact protection functions and trip thresholds of this specific PCB have not been confirmed from an HCY model-specific datasheet.

Therefore, specifications such as:

• Overcharge trip voltage
• Over-discharge trip voltage
• Maximum current
• Short-circuit trip current

should not be assumed solely from the appearance of the PCB.

5. Suitable Applications

This battery may be suitable for compatible 3.7V devices such as:

• Bluetooth speakers
• GPS devices
• Portable electronics
• IoT devices
• Small embedded systems
• Portable instruments
• DIY electronics projects
• Rechargeable electronic products
• Battery replacement applications

Compatibility depends on the electrical and physical requirements of the device.

6. Charging & Usage

This is a single-cell 3.7V Lithium Polymer battery and must be used with a charging circuit designed specifically for 1S Li-ion / LiPo batteries.

Before installation:

• Confirm correct polarity
• Confirm device operating voltage
• Confirm required discharge current
• Use a compatible LiPo charging circuit
• Do not directly connect the battery to an unsuitable power supply
• Do not exceed manufacturer-specified charging or discharge limits

7. Advantages of LiPo Pouch Cells

• Flat and compact form factor
• High energy storage relative to size
• Rechargeable
• Lightweight construction
• Suitable for slim portable devices
• Flexible choice for custom electronics and replacement applications

8. Compatibility Note

Before purchasing, compare the replacement battery with your existing battery for:

• Nominal voltage: 3.7V
• Capacity: 1000mAh
• Physical dimensions
• Red/black wire polarity
• Connector or bare-wire arrangement
• Device current requirement
• Charging system
• Available installation space

The same voltage and capacity alone do not guarantee that a battery will work in every device.

9. Safety Note

Lithium Polymer cells must be handled carefully.

• Do not puncture or crush the pouch
• Do not bend the battery excessively
• 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
• Use a charger specifically designed for the battery chemistry