KAIHENG Battery Load Tester 6V/12V - 100A/50A Fixed Load with Voltmeter & Copper Clips

KAIHENG Battery Load Tester is a handheld diagnostic tool that applies a controlled load to 6V and 12V batteries so you can quickly determine battery and charging-system health. Whether you maintain family cars, work on fleet vehicles, or own an RV or boat, this compact tester combines a voltmeter and fixed-load circuit to simulate starter draw and reveal weak batteries before they strand you. It delivers a reliable 100 A fixed load for 12V batteries and 50 A for 6V systems, while the clear readout and color-coded copper clips make testing straightforward for DIYers and pros alike.

How does this tester check battery condition?

The KAIHENG tester places a controlled, time-limited load across the battery to mimic the starter motor’s demand, then shows whether voltage holds under stress. That pressurized check is more revealing than a simple open-circuit voltage reading because it exposes batteries that fail under load.

• Applies 100 A load for 12V and 50 A load for 6V batteries
• Hold load up to 10 seconds to simulate starting current
• Voltage accuracy of ±0.2 V for reliable pass/fail interpretation

Can I use this on different vehicles and battery sizes?

Yes — the unit is designed for common 6V and 12V lead-acid batteries used in cars, motorcycles, ATVs, boats, and RVs. The heavy-duty copper clips and insulated handle make it usable in garages, driveways, or at the roadside.

• Suitable for cars, trucks, SUVs, motorcycles, ATVs, boats and RVs
• Copper clip connectors with red/black grips ensure correct polarity
• Portable, simple hookup without additional adapters

What safety and durability features does it include?

The KAIHENG tester is built for repeated garage use with insulated grips and a molded carry handle to protect hands while moving the tool. The copper clips provide solid electrical contact and the fixed-test duration reduces risk of prolonged discharge.

• Insulated top handle for secure carrying and operation
• Red positive and black negative rubber grips to prevent misconnection
• Designed to avoid extended draw — typical load held up to 10 seconds

How does the voltmeter and readout help diagnose the charging system?

The integrated voltmeter reports battery voltage both at rest and under applied load, enabling quick checks of alternator output and starter draw behavior. Use it to compare no-load voltage to loaded voltage to spot weak batteries or charging issues.

• Shows static and load voltage for clear diagnosis
• Helps identify charging problems when voltage is low under load
• Accurate to ±0.2 V for consistent troubleshooting results

Who is this for: This tool is aimed at vehicle owners, home mechanics, fleet managers and small repair shops that need an affordable, portable way to test 6V and 12V batteries and basic charging-system function. If you want to preemptively verify starting reliability, perform routine maintenance checks, or diagnose whether a battery or alternator is at fault, the KAIHENG Battery Load Tester gives a fast, hands-on answer without complex setup. Its rugged clips, clear results and compact form make it a useful addition to any roadside kit, garage bench or service vehicle toolbox.

FAQ

Q: Will this tester work on both 6V and 12V batteries?

A: Yes. It supports 6V batteries at 50 A load and 12V batteries at 100 A load for accurate condition checks.

Q: How long should I hold the load during a test?

A: Hold the load for up to 10 seconds to simulate starter draw and observe voltage under stress.