4S 3.7V Lithium Battery Capacity Indicator

4-Series (4S) Lithium Battery Calibration: Engineered specifically for 4-cell (4S) 14.8V nominal and 16.8V fully charged lithium-ion, LiPo, and 18650 battery packs.

5-Segment Visual LED Battery Bar Display: Features a clear 4-bar capacity grid surrounded by a battery frame indicator that lights up according to charge level:

14.8V (1 bar): 25% capacity

15.4tV (2 bars): 50% capacity

16.1V (3 bars): 75% capacity

16.8V (4 bars): 100% capacity

Ultra-Low Operating Power Draw: Consumes minimal quiescent current during operation, preserving your battery pack's total energy reserve while providing real-time telemetry.

Compact PCB Panel Form Factor: Slim panel-mount design allows effortless integration into battery cases, DIY project boxes, and custom electronics housings.

Simple Two-Wire Solder Interface: Clearly marked + and - solder pads make direct wiring to battery nodes or power switches fast and foolproof.

Board Material: High-grade FR-4 glass-reinforced epoxy PCB equipped with surface-mount LED indicators and precision voltage comparator ICs.

Technical Specifications:

Series Configuration: 4S (4 Cells, 14.8V nominal / 16.8V max).

Display Type: 5-segment LED Bar Graph (Blue/Green/Red options).

Operating Voltage Range: 13.2V – 16.8V DC.

Board Color: Green PCB.

Usage Advice: Connect the positive pad (+) to the battery's positive output and the negative pad (-) to ground; ensure proper polarity before powering on.

Maintenance: Keep solder connections dry and free from flux residue or metallic dust to avoid stray currents and premature corrosion.

Essential 16.8V Battery Fuel Gauge: Position as an indispensable status monitor for custom 16.8V 18650 battery packs, power tool battery builds, RC ground vehicles, and portable solar generator setups.

Highlight At-a-Glance Telemetry: Emphasize how the bright LED bar graph gives users instant visual clarity on remaining battery charge without needing a multimeter.

Recommended Cross-Sell Add-ons: Pair with 1S Lithium Battery Capacity Indicator, 2S Lithium Battery Capacity Indicator, 3S Lithium Battery Capacity Indicator, LCD Digital Battery Capacity Checker CellMeter 1-8S, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Battery Capacity and Voltage Meter collection page as your standard 4S 14.8V/16.8V lithium capacity indicator.