EXP-2600 Hydrometer Safe Battery Tester W/App

June 2, 2023
Exponential Power's battery tester allows users to test batteries without removing the liquid from the battery and captures all data through its app.

Measuring battery conditions without extracting liquid from the battery, the EXP-2600 Hydrometer brings efficiency and safety to battery testing. When paired with Exponential Power’s Battery Vault App, it can also capture all readings and automatically generate an inspection report summary.


The EXP-2600 measures the temperature and refractive index of scattered light in the test liquid, evaluates it, and returns a reading nearly instantly. It delivers a specific gravity reading without having to remove liquid from the battery. The hydrometer features a solid refractometry sensor with a built-in thermistor, thus no electrolyte is removed from the battery or brought into the device.


Ergonomically designed with tactile buttons, it easily tests multiple batteries in succession and its dimensions allow for access to all flooded battery types. It reads specific gravity in a range from 1 to 1.4 and is accurate to three decimal points + or - .002. Readings are instantly displayed by inserting the sensor directly into the battery electrolyte. Its built-in zero adjust feature reduces calibration requirements and when needed, it's easily calibrated in distilled water.


The EXP-2600 has a rechargeable lithium battery and features a magnetic charger along with replaceable measuring cells.


The Battery Vault App is a large repository of lead acid battery data, providing customers with real-time analysis and tools for forecasting budgeting, maintenance, and service. When paired with the EXP-2600, the Battery Vault App captures all readings and generates a report summary with instant feedback on Android and iOS devices.

  • Eliminates manual report generation
  • Electrolyte measured inside battery
  • Instantaneous readings with 3-decimal accuracy
  • 3-in-1 product: hydrometer, voltmeter, and flashlight
  • Allows for access to all flooded battery types
  • Easily calibrated with distilled or de-ionized water
  • Complete Bluetooth and app integration
  • Rechargeable lithium battery
  • Built-in flashlight for cell inspection
  • Lightweight, ergonomic design
  • Replaceable sensor assembly
  • Specific gravity, temperature, and voltage displayed on LCD screen
  • Voltage measured and recorded to 6 decimal places and displayed to 2 decimal places
  • Protective case
  • Patented technology

EXP-2600 App:

  • Captures all readings and automatically generates an inspection report summary
  • Delivers instant feedback on Android or iOS device
  • Complete your inspection report with photos, and open-field feedback
  • Store an incomplete inspection and resume when ready
  • Automatically upload report to Battery Vault Cloud Storage for permanent archiving
  • End-user, service tech, service manager, and sales all have instant feedback on battery inspection
  • Offers guided and unguided workflows
  • Error correction to overwrite a bad or missed reading
  • Automatic temperature compensation of specific gravity
  • Trended data over time for compliance purposes
  • Predictive analytics based on trended and real-time data
  • Access to world’s largest battery repository
 Calibration Distilled or de-ionized water Measuring Time Instant S.G. Range 1.000 to 1.400 DC Volt Range 0 to 100 V; can withstand 300 V Temperature Measuring: ±1.8°F @ 0 to 125°F (1°C @ 0 to 51°C) Method of Detection Specific gravity; light refraction method Accuracy & Resolution Specific gravity: ±0.002 @ 40 to 125°F (5 to 51°C) Power Supply(s) 3.7 V rechargeable li-ion battery Measuring Tube (L x Dia.)  7 x 1/8-in. (178 x 3 mm) Dimensions (D x W x H) 2.75 x 1.75 x 13.25 (70 x 44 x 337 mm)