3S Lithium Battery Capacity Indicator

3-Series (3S) Lithium Battery Calibration: Engineered specifically for 3-cell (3S) 11.1V nominal and 12.6V 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:

11.1 V (1 bar): 25% capacity

11.6V (2 bars): 50% capacity

12.1 V (3 bars): 75% capacity

12.6V (4 bars): 100% capacity

Ultra-Low Operating Power Consumption: Draws minimal quiescent current during operation, preserving your battery pack's energy while providing continuous status feedback.

Compact PCB Panel Form Factor: Compact module footprint allows easy mounting into battery enclosures, DIY project boxes, and portable device cases.

Simple Two-Wire Solder Interface: Clearly marked + and - solder pads make wiring directly to the battery terminals 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: 3S (3 Cells, 11.1V nominal / 12.6V max).

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

Operating Voltage Range: 9.9 V – 12.6V DC.

Board Color: Green PCB.

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

Maintenance: Keep solder terminals free of excess flux, dust, and moisture to avoid parasitic drain or premature corrosion.

Essential 12V Battery Fuel Gauge: Position as an indispensable status indicator for custom 12V 18650 battery packs, Bluetooth speakers, solar backup systems, and 3S RC power packs.

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

Recommended Cross-Sell Add-ons: Pair with 1S Lithium Battery Capacity Indicator, 2S Lithium Battery Capacity Indicator, 4S 3.7V 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 3S 12V lithium capacity indicator.