Lithium Polymer Lipo Rechargeable Battery Model KP 312278 3.7V 500mAH 

The KP 312278 3.7V 500mAH Lithium Polymer Battery is an ultra-slim, lightweight, and efficient rechargeable battery designed for compact electronic devices. The model number “312278” indicates its approximate physical dimensions—3.1 mm thickness, 22 mm width, and 78 mm length—making it ideal for thin gadgets and embedded applications where space is extremely limited.

Despite its slim form factor, this Li-Po cell provides a dependable 500mAH capacity along with stable voltage output, low internal resistance, and excellent cycle performance. It is well-suited for IoT systems, smart cards, wearables, portable medical devices, and slim consumer electronics.

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Features

• Ultra-slim design for space-restricted applications
• High energy density in a compact form
• Stable 3.7V nominal voltage
• Reliable 500mAH capacity for low-to-medium power usage
• Lightweight and durable Lithium Polymer chemistry
• Supports efficient CC/CV charging (up to 4.2V)
• Low self-discharge for long standby operation
• Long cycle life with proper usage
• Optional integrated protection circuit (depending on variant)

Specifications

• Model: KP 312278
• Nominal Voltage: 3.7V
• Capacity: 500mAH
• Battery Type: Lithium Polymer (Li-Po)
• Full Charge Voltage: 4.2V
• Charging Method: CC/CV (Constant Current / Constant Voltage)
• Standard Charge Rate: 0.5C
• Max Charge Rate: 1C
• Max Discharge Current: Typically 1C–2C
• Cycle Life: 300–500 cycles
• Dimensions (Approx.):
• Thickness: 3.1 mm
• Width: 22 mm
• Length: 78 mm
• Weight: 8–15g (approx.)
• Operating Temperature:
• Charge: 0°C to +45°C
• Discharge: –20°C to +60°C

Applications

• Ultra-thin portable electronics
• IoT sensors and wireless modules
• Smart cards and access control devices
• Wearable devices and fitness modules
• Portable medical instruments
• Bluetooth gadgets and compact controllers
• Slim handheld devices
• DIY electronics and embedded designs