300mA 3.7V Rechargeable Li Polymer Battery With Protection Circuit and Wires

300mA 3.7V Rechargeable Li Polymer Battery With Protection Circuit and WiresThis compact 300mA 3.7V Rechargeable Li Polymer Battery With Protection Circuit and Wires is designed to deliver safe and reliable portable power for miniature electronics and wearable devices. Furthermore, it features an integrated protection circuit module (PCM), consequently safeguarding the lithium-ion polymer cell against over-charging, over-discharging, and short-circuit faults. Therefore, it is an ideal power source for space-constrained hobbyist projects, Bluetooth gadgets, and microcontrollers. However, users must ensure that charging voltages do not exceed standard lithium polymer thresholds to maintain battery health. Specifically, the flexible pouch format includes pre-attached red and black wire leads for effortless soldering. Moreover, the high energy density provides dependable runtimes despite its ultra-slim profile. Ultimately, this rechargeable LiPo cell offers an efficient and secure energy solution for custom mobile hardware.

Key Features:

• Integrated Protection Circuit: Built-in PCM prevents over-charge, over-discharge, and short-circuit conditions automatically.
• Compact Lithium Polymer Cell: Ultra-thin pouch design maximizes capacity while maintaining a lightweight footprint.
• Pre-Attached Wire Leads: Equipped with stranded red (positive) and black (negative) wires for direct connection.
• High Energy Density: Delivers stable nominal 3.7V output voltage for efficient low-power device operation.
• Low Self-Discharge: Retains charge effectively over extended periods when stored properly.
• Flexible Form Factor: Easily fits into narrow enclosures where rigid cylindrical cells cannot go.

Technical Specifications:

• Battery Type: Lithium Ion Polymer (LiPo)
• Capacity: 300 mAh (Model: HCY-502035)
• Nominal Voltage: 3.7V DC
• Fully Charged Voltage: 4.2V DC
• Cut-off Voltage: ~3.0V DC
• Operating Temperature Range: −20°C to +60°C

Mechanical Specifications:

• Enclosure Type: Soft Aluminum Foil Pouch with Kapton Protection Tape
• Wiring: Flexible Insulated Stranded Wire Leads (Red/Black)
• Protection Board: Integrated Micro-PCM strip attached at cell edge

Dimensions:

• Thickness (Max): ≈ 5.0 mm
• Width: ≈ 20.0 mm
• Length: ≈ 35.0 mm
• Wire Length: ≈ 50.0 mm

Pinout and Wiring:

• Red Wire: Connect to the positive power input/output terminal of your circuit.
• Black Wire: Connect to the negative common ground terminal of your circuit.
• Polarity Caution: However, always double-check wire polarities before connecting to avoid permanent damage to your project hardware.

Datasheet Reference:

• Download Lithium Ion Polymer Battery Technical Guide

Commonly Used in:

• Wearable Electronics: Powering compact smartbands, health monitors, and miniature trackers.
• Bluetooth Peripherals: Providing portable energy for custom wireless mice, headsets, and modules.
• Micro-IoT Devices: Energizing ESP32-CAM or Arduino-based portable sensor nodes.

Applications:

• Miniature Power Solutions: Delivering standalone battery operation for space-limited DIY builds.
• Rechargeable Gadget Repairs: Serving as a direct replacement cell for expired internal batteries in small electronics.
• Consequently, it enables extended untethered operation for handheld field instruments.

Equivalent Models:

• 3.7V 400mAh LiPo Battery: Slightly higher capacity alternative cell in a similar form factor.
• 3.7V 200mAh LiPo Battery: Smaller capacity variant for even tighter spatial constraints.
• 18650 Li-ion Cell: A larger, cylindrical rechargeable battery option for higher-capacity demands.

Package Includes:

• 1 x 300mA 3.7V Rechargeable Li Polymer Battery With Protection Circuit and Wires