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READ ALL INSTRUCTIONS BEFORE USING
For your safety, the safety of others, the product, and the vehicle you are working on, PLEASE, CAREFULLY READ AND MAKE SURE YOU FULLY UNDERSTAND ALL THE SAFETY INSTRUCTIONS AND MESSAGES ON THIS MANUAL.
ONLY OPERATE THE TEST IN A WELL-VENTILATED AREA since the vehicle produces carbon monoxide, a toxic and poisonous gas, and particulate matter when the engine is running.
ALWAYS WEAR APPROVED SAFETY EYE PROTECTION to prevent damage from sharp objects and caustic liquids.
ALWAYS BE AWARE OF MOVING PARTS (such as coolant fans, pulleys, belts) since they spin or turn at high speeds when the engine is running.
DO NOT TOUCH HOT ENGINE PARTS to prevent severe burns. The engine parts become very hot when the engine is running.
ALWAYS SHIFT THE GEAR TO P (FOR AUTOMATIC TRANSMISSION) OR TO NEUTRAL (FOR MANUAL TRANSMISSION) AND MAKE SURE THE PARKING BRAKE IS ENGAGED.
ALWAYS USE A DIGITAL MULTIMETER WITH AT LEAST 10 MEGOHMS OF IMPEDANCE when conducting electrical tests on vehicles to prevent causing damage to on-board electronic components.
NO SMOKING ANYWHERE NEAR THE VEHICLE when testing. The fuel and battery vapors are highly flammable.
DO NOT WEAR LOOSE CLOTHING OR JEWELRY WHEN WORKING ON AN ENGINE.
Loose clothing can easily be caught in the engine's fan, pulleys, belts, etc. and jewelry is highly conductive, which causes severe burn or electric shock if it contacts with electricity.
DO NOT CUT THE PRODUCTS CORDS OR SUBMERGE THEM IN WATER. The product is an electrical device that can cause shock and severe burns.
Battery acid is extremely corrosive. If acid gets into your eyes, FLUSH THEM THOROUGHLY WITH COLD RUNNING WATER FOR AT LEAST 20 MINUTES AND SEEK MEDICAL ATTENTION IMMEDIATELY. If battery acid gets on your skin or clothing, WASH IT IMMEDIATELY WITH A SOLUTION OF WATER AND BAKING SODA.
Refer to the battery label for battery type and CCA values (Cold Cranking Amp).
Note: If your vehicle battery is not the battery mentioned above and you are not sure about which type it is, please choose AGM to conduct test, and the error is within 10%.
Buttons | Operations |
![]() | Page up, or increase the battery rating values |
![]() | Page down, or decrease the battery rating values |
OK | Confirm, enter or proceed |
![]() | Cancel, or return to the previous page |
Black Smart Clamp | Connect to the negative terminal of the vehicle battery |
Red Smart Clamp | Connect to the positive terminal of the vehicle battery |
The tool is solely powered by the vehicle battery. Connect the RED (+) Positive Battery Clamp to the (+) positive battery terminal, and connect the BLACK (-) Negative Battery Clamp to the (-) negative battery terminal. Ensure that the clamps are securely attached to the correct terminals.
The LED display will show the message below:
Press the "OK" to enter the main menu, then choose your preferable language.
TOPDON BT50 will test each battery according to the selected actual system standard and rating marked on the battery.
The engine and all other accessory loads must be OFF in order to get accurate results. Turn on the vehicle headlamps for 2~3 minutes until the battery voltage drops back to normal value if the battery is just fully charged.
The engine and all other accessory loads must be OFF in order to get accurate results.
Please refer to the table below to confirm the test result for 12V batteries.
Cranking Voltage | Conclusion |
≥10.7V | GOOD |
9.6~10.7V | NORMAL |
<9.6V | CRANKING LOW |
The engine must be ON during test.
Please refer to the table below to confirm the test result for 12V batteries.
Status | Battery Voltage | Conclusion |
Headlamps & A/C OFF (Depress Accelerator) | ≥15.0V | CHARGING HIGH |
13.2V~15.0V | CHARGING NORMAL | |
12.8V~13.2V | CHARGING LOW | |
<12.8V | NO OUTPUT |
* For reference only. Poorly functioning batteries can affect the test data.
Note: This battery tester saves the results of the last test, but not all the test data.
Q1: Can BT50 test the battery installed in the vehicle?
A: Yes, it supports in-vehicle and out-of-vehicle testing.
Q2: Is the test result accurate?
A: Yes. Our BT50 features advanced conductance detection, able to give you accurate test results in seconds.
Q3: What batteries can BT50 work on?
A: It works on 12V regular flooded, AGM Flat plate, AGM Spiral, GEL and Deep Cycle batteries, with CCA between 100 to 2000.
Q4: Is BT50 designed with any built-in protections?
A: Yes. It offers peace of mind with extra-safe Reverse Polarity and Sparkproof protection, and easy operations even if you're new to battery testing.
Q5: How do I confirm if my vehicle battery is bad or good?
A: The battery tester will display SOH (State of Health), SOC (State of Charge), CCA (Cold Cranking Ampere), Voltage,
Internal Resistance, and Rating, with an intuitive test result of "GOOD" or "BAD" for your reference. If the internal resistance is too large, it indicates a broken battery.
Q6: Can this battery tester estimate the remaining capacity of my battery?
A: Yes. The battery tester will display SOC (State of Charge) to express as a percentage of your battery's rated capacity, a measure of its condition to assess the potential energy.
Note that a decent SOC (State of Charge) doesn't mean the battery is in good condition. You need to refer to your battery's actual CCA Value and Internal Resistance for further analysis.
Working Temperature: | -10°C~50°C (14°F~122°F) |
Storage Temperature: | -20°C~70°C (-4°F~158°F) |
Operating Voltage: | DC 8~16V |
Dimensions: | 125.3 x 65.5 x 18.6mm (4.9 x 2.6 x 0.7") |
Testing Range: | 100~2000 A |
Battery Capacity Range: | 30~200 Ah |
TOPDON THREE YEARS LIMITED WARRANTY
The TOPDON Company warrants to its original purchaser that TOPDON products will be free from defects in material and workmanship for 12 months from the date of purchase (Warranty Period). For the defects reported during the Warranty Period, TOPDON will, according to its technical support analysis and confirmation, either repair or replace the defective part or product.
TOPDON shall not be liable for any incidental or consequential damages arising from the use, misuse, or mounting of the device. Some states do not allow limitations on how long an implied warranty lasts, so the above limitations may not apply to you.
This limited warranty is void under the following conditions:
Misused, disassembled, altered, or repaired by unauthorized stores or technicians.
Careless handling and violation of operation.limitations may not apply to you.
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
Download Topdon BT50 - 12V Battery Tester 100-2000 CCA Manual
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