4S 18650 Lithium Battery Capacity Indicator Module Level Tester LED

4-Series (4S) Lithium Battery Gauge: Specialized capacity monitor designed for 4-cell (4S) 14.8V nominal / 16.8V 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 > 13.2V: 1st bar illuminates (25%).

Battery voltage > 14.0V: 2nd bar illuminates (50%).

Battery voltage > 14.8V: 3rd bar illuminates (75%).

Battery voltage > 15.6V: 4th bar illuminates (100%).

Low Power Consumption: Operates with minimal static current draw, 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: 4S (4 Cells, 14.8V nominal / 16.8V peak).

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

Working Voltage Range: 13.2V – 16.8V DC.

Board Color: Blue PCB.

Usage Advice: Solder the positive (+) and negative (-) leads across the total 4S 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 14.8V / 16.8V Battery Accessory: Position as an indispensable status indicator for 4S 18650 battery packs powering drone ground stations, high-power RC vehicles, portable power stations, and DIY audio gear.

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 3S 18650 Lithium Battery Capacity Indicator Module Level Tester LED, 2S 18650 Lithium Battery Capacity Indicator Module Level Tester LED, 18650 BMS Board 4S 40A Balanced 16.8V, 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 4S LED battery capacity indicator.