3S 18650 Lithium Battery Capacity Indicator Module Level Tester LED

3-Series (3S) Lithium Battery Gauge: Specialized capacity monitor for 3-cell (3S) 11.1V / 12V nominal / 12.6V max charge lithium-ion, LiPo, and 18650 battery packs.

4-Level LED Bar Display: Features 4 blue LED segments and 1 red battery outline frame LED to provide clear visual indication of remaining battery charge (25%, 50%, 75%, and 100%).

Real-Time Voltage Threshold Monitoring:

Battery voltage > 9.9V: 1st bar illuminates (25%).

Battery voltage > 10.5V: 2nd bar illuminates (50%).

Battery voltage > 11.1V: 3rd bar illuminates (75%).

Battery voltage > 11.7V: 4th bar illuminates (100%).

Low Static Power Consumption: Draws minimal quiescent current during operation, preventing battery drain during testing.

Compact Strip Form Factor: Ultra-compact PCB layout with clearly marked solder pads (+ and -) for easy mounting in project enclosures, battery boxes, or portable devices.

Board Material: High-grade FR-4 glass-reinforced epoxy PCB equipped with surface-mount resistor array, LED display indicators, and voltage comparator control IC.

Technical Specifications:

Series Configuration: 3S (3 Cells, 11.1V–12V nominal / 12.6V peak).

Display Type: 5-segment LED bar (1 red frame + 4 blue level indicators).

Working Voltage Range: 9.9V – 12.6V DC.

Board Color: Blue PCB.

Usage Advice: Solder the positive (+) and negative (-) leads across the total 3S battery pack output or route through a momentary push-button switch for on-demand capacity checks.

Maintenance: Keep the board dry and clean of solder flux or conductive debris to maintain accurate voltage sensing.

Essential 12V Battery Accessory: Position as an indispensable status indicator for 3S 18650 battery packs powering RC vehicles, LED strip lights, portable power banks, and robotics.

Highlight On-Demand Check Setup: Recommend pairing with a momentary tactile switch so users can instantly check charge status without leaving the display continuously powered.

Recommended Cross-Sell Add-ons: Pair with 2S 18650 Lithium Battery Capacity Indicator Module Level Tester LED, 4S 18650 Lithium Battery Capacity Indicator Module Level Tester LED, 3S 11.1V 10A Battery Management System / BMS Module, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your LiFePO4 (LFP) Hardware BMS Modules collection page as your standard 3S LED battery capacity indicator.