CellMeter-8 Battery Capacity (Voltage) Checker and Servo Tester
by No Brand

The CellMeter-8 Battery Capacity (Voltage) Checker, Balancer, and Servo Tester is a multi-functional diagnostic tool engineered for RC pilots, drone builders, and bench technicians. Featuring a high-contrast 2.6-inch backlit LCD screen, this handheld instrument provides instant diagnostic feedback for lithium (LiPo, LiFe, Li-ion) and nickel (NiMH, NiCd) battery packs, as well as standalone servo and ESC signal testing.

In battery checker mode, the CellMeter-8 measures individual cell voltages, total pack voltage, lowest/highest cell values, voltage differential (Delta V), and remaining percentage capacity for 2S to 8S lithium batteries. When connected to a balance port, it actively functions as a cell balancer and discharger to level out individual cell voltages. Furthermore, an integrated servo tester port generates PWM signal outputs supporting manual, neutral, and automatic sweep testing for both standard and narrow-band servos and electronic speed controllers.

Key Features

• Multi-Chemistry Battery Testing: Compatible with 2S to 8S LiPo, LiFe, and Li-ion lithium battery packs, as well as 4S to 8S NiMH/NiCd nickel packs.

• Cell Voltage Balancing and Discharging: Built-in balancing circuit levels cell voltages across lithium packs to prevent overcharge and cell degradation during field operations.

• Integrated Servo and ESC Tester: Outputs adjustable PWM signals for testing standard (50Hz) and narrow-band (125Hz/250Hz) digital or analog servos and driving ESCs without a radio receiver.

• 2.6-Inch Backlit LCD Display: High-visibility screen displays individual cell voltages, overall pack voltage, high/low cell delta, and estimated remaining capacity percentage.

• Three Servo Test Modes: Offers Manual (knob control), Neutral (1500us centering), and Automatic (sweeping sweep) modes to diagnose servo gears and centering accuracy.

• Compact Portable Design: Lightweight pocket-sized housing with standard 2.54mm pin spacing for lithium balance plugs and 3-pin servo leads.

Technical Specifications

• Model Identifier: CellMeter-8 Battery Capacity Checker, Balancer, and Servo Tester

• Lithium Battery Support: 2S - 8S (LiPo, LiFe, Li-ion)

• Nickel Battery Support: 4S - 8S (NiMH, NiCd)

• Display Screen: 2.6-inch High-Contrast LCD with Backlight

• Port Compatibility: Standard 2.54mm Pitch Balance Port Pins and 3-Pin Servo Lead Port

• Display Data Metrics: Total Voltage, Individual Cell Voltages, Lowest Cell Voltage, Highest Cell Voltage, Voltage Differential (Delta V), Remaining Capacity Percentage (%)

• Servo Test Signal Types: Standard PWM (50Hz), Narrow Band PWM (125Hz / 250Hz)

• Servo Test Modes: Manual Adjustment, Neutral Centering, Automatic Sweep

• Discharge/Balance Cutoff Voltage: 3.7V Default (Adjustable)

• Operating Voltage Range: Powered directly by tested battery pack or external 5V input for servo test

• Dimensions: 85 mm x 50 mm x 16 mm

• Net Weight: 45 grams