Battery Acid Tester Hazet 4650-1 — handheld battery electrolyte tester for lead-acid batteries

Hazet 4650-1 Battery Acid Tester is a handheld battery electrolyte tester designed for measuring the specific gravity of electrolyte in lead-acid batteries. The single-piece, portable instrument provides quick readings to assess state of charge and identify issues such as sulphation or stratification. Intended for use in workshops and mobile service environments, the tester delivers fast, practical information to support battery maintenance and diagnostics.

Advantages

The Hazet handheld tester offers rapid measurement of acid density with a simple single-piece design that requires minimal setup. Its compact format supports convenient handling in confined spaces and during mobile service calls. Readings help technicians make informed maintenance decisions by indicating charge level and electrolyte condition without complex procedures.

Suitable for

• Routine battery maintenance in workshops and garages
• Mobile service and roadside battery checks
• Diagnostics of lead-acid starter, deep-cycle, and maintenance-free batteries where electrolyte access is available
• Assessing state of charge and detecting sulphation or electrolyte stratification

Key specifications

• Type: handheld electrolyte/acid density tester for lead-acid batteries
• Measurement purpose: specific gravity of battery electrolyte to assess state of charge
• Form factor: single-piece portable instrument for direct sampling
• Application environment: workshop and mobile service use
• Suitable battery chemistry: lead-acid (including flooded starter and deep-cycle batteries where electrolyte access is possible)

How to use

Access a battery cell vent or remove the cell cap following the battery manufacturer’s safety instructions. Insert the tester’s sampling tube into the electrolyte and draw a sample according to the instrument’s handling method, then read the specific gravity value indicated by the device. Compare the measured specific gravity with standard state-of-charge reference values for lead-acid batteries to evaluate charge level and electrolyte condition. After measurement, return electrolyte to the cell if relevant and clean the tester following safe handling procedures for acidic fluids.

Usage recommendations

Always wear appropriate personal protective equipment, including gloves and eye protection, when working with battery electrolyte. Perform measurements in a well-ventilated area, avoid contact with skin or clothing, and dispose of or neutralize any excess electrolyte per local regulations. Do not use the tester on sealed or maintenance-free batteries where cell access is not intended by the manufacturer.