1S 3.7V Li-ion BMS Protection Board with Thermistor for 18650 Battery

1S 3.7V Li-ion BMS Protection Board with Thermistor

The 1S 3.7V Li-ion BMS Protection Board is a battery protection circuit listed for single-cell lithium-ion battery applications. The product title identifies it as a thermistor / temperature-sensor version for 18650 lithium-ion and lithium-polymer battery projects.

This compact protection board is intended for battery-pack protection applications. The matching seller descriptions identify overcharge, over-discharge, short-circuit, and over-current protection functions.

The product is listed as a 1S, 3.7V battery protection board. However, the exact current rating and temperature-protection behavior need supplier confirmation because the product title and matching listing specifications are inconsistent.

Key Features

• 1S battery configuration: Listed for a single-cell battery configuration.

• 3.7V nominal battery listing: Identified for 3.7V lithium-ion battery applications.

• 18650 battery application: Product title specifically references 18650 lithium-ion batteries.

• Overcharge protection: Listed in matching seller descriptions.

• Over-discharge protection: Listed in matching seller descriptions.

• Over-current protection: Listed in matching seller descriptions.

• Short-circuit protection: Listed in matching seller descriptions.

• Thermistor / temperature sensor: Identified in the product title; exact temperature protection thresholds and function are not confirmed.

Technical Specifications

Important: The table combines details from matching seller listings, not an authenticated manufacturer datasheet for this exact board. The listed 2A charge/discharge values conflict with the product title's 5A claim. Do not publish the 5A rating, temperature cutoff values, or exact compatibility as confirmed until the supplier verifies the board revision.

 Protection Functions

The matching product listings describe these protection functions:

• Overcharge protection

• Over-discharge protection

• Over-current protection

• Short-circuit protection

The product title mentions a temperature sensor / thermistor. However, the available matching product descriptions do not establish the sensor's operating temperature range, cutoff thresholds, or whether it automatically interrupts charging or discharging. These details should not be claimed without a product-specific datasheet.

Typical Applications

Potential applications for a verified compatible 1S battery protection board include:

• Single-cell 18650 lithium-ion battery packs

• Small battery-powered electronics

• DIY lithium-ion battery projects

• Portable electronic devices

• Battery pack protection projects

These are general application examples. Confirm battery chemistry, current requirement, wiring, and temperature-protection behavior before use.

Installation Caution

• Confirm the exact board revision before connecting a battery.

• Verify the battery chemistry and nominal voltage.

• Confirm the board's charging and discharging current ratings.

• Do not assume the advertised 5A rating is correct.

• Confirm whether the thermistor is included and how it must be connected.

• Do not assume temperature protection is active merely because the product title mentions a thermistor.

• Follow the supplier's verified wiring diagram.

• Use suitable insulation and battery-pack assembly practices.

• This board should not be treated as a charger.

 Related Products – Electronics Hub

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• 18650 Lithium-Ion Cell

• 1000mAh 3.7V 18650 Lithium-Ion Cell

• 3.7V 18650 Battery with Wire, JST Connector and BMS Protection

• Battery Cells Collection

These are related product links. Compatibility with this exact BMS is not guaranteed.