8.4V 2s Lithium Battery Capacity Tester/Indicator

2-Series (2S) Lithium Battery Calibration: Engineered specifically for 2-cell (2S) 7.4V nominal and 8.4V 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:

6.6V (1 bar): 25% capacity

7.2V (2 bars): 50% capacity

7.8V (3 bars): 75% capacity

8.4V (4 bars): 100% capacity

Ultra-Low Operating Power Draw: Draws minimal quiescent current during operation, preserving your battery pack's total energy reserve while providing real-time 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 Interface: Pre-wired or solder-friendly positive (+) and negative (-) terminals make wiring directly to battery nodes fast and straightforward.

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: 2S (2 Cells, 7.4V nominal / 8.4V max).

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

Operating Voltage Range: 6.0V – 8.4V DC.

Board Color: White / Green PCB.

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

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

Essential 8.4V Battery Fuel Gauge: Position as an indispensable status monitor for 2S 18650 battery packs, RC cars, headlamps, heated jackets, and portable audio devices.

Highlight At-a-Glance Telemetry: Emphasize how the bright LED bar graph gives users instant visual clarity 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, 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 2S 8.4V lithium capacity indicator.