Topdon BT50

Why You Need A Car Battery Tester?
On a cold morning when you are rushing to work, but the car failed to start? The cause of this may be a flat battery. When your battery runs down and can’t start your vehicle, it’s important to determine if it’s drained and needs to be recharged, or it’s too weak to hold a charge.

Why The TOPDON BT50?

1. Perform almost every battery testing functions as the TOPDON BT100 in a budget-friendly package.
2. Operates on most 12V lead-acid batteries: Regular-Flooded, AGM Flat Plate, AGM Spiral, GEL, EFB within 100-2000 CCA.
3. Microprocessor-controlled conductive testing technology gives complete and accurate measurements in seconds.
4. Provides a wealth of data you need about the battery, starter, and alternator.
5. Displays SOH, SOC, CCA, voltage, internal resistance, cranking voltage & time, no-load & loaded voltage, charging ripple value, etc.
6. Wide rating system coverage: CCA, BCI, CA, MCA, JIS, DIN, IEC, EN, SAE, and GB.
7. 3 automatic safety protections against reverse-connections, over-heating, and sparks to ensure no damage would occur during use.
8. Can test a battery that is either in or out of the vehicle.
9. Built with quality for long use.
10. A 4 button-based navigation menu and intuitive User Interface; perfect for entry-level DIYers and professionals alike.

Battery Health Test
Accurate and speedy. Once you connect this 12V battery tester to battery terminals, you’ll get the readings of CCA values/ratings, voltages, internal resistance, state of health (SOH), and state of charge (SOC) in 3 seconds, with concise results like “GOOD, BAD, REPLACE, or RECHARGE” for quick checkups.

Cranking Test
If your car battery is 4 or more years old, this battery tester helps predict if the battery will fail to start the vehicle.

The BT50 will show you the cranking time in milliseconds, and record the lowest voltage that the battery is able to maintain while the starting motor is working.

If the result is < 9 volts, you need a battery replacement.

Charging Test
If you find the engine has difficulty continually running while traveling, switch this load tester to the charge testing mode with the vehicle running.

If the battery and alternator are good, the result should be between 14.2~14.5 volts. Lower than this means your alternator or parts of the charging system need to be investigated.


Data Review
This car battery tester gets answers fast. It can automatically record the most recent test result.

This way you’ll easily get the previous data to avoid the retest from the scratch and keep the battery health logs or share the information with others.

3 Safety Features
Safety risks are minimized during use thanks to the Spark-Proof Connection – saving you from the possibility of a fire;

Reverse Polarity Protection - prevents damage if the battery clamps are connected to the wrong terminals;

Overheat Protection - automatically shut the tester off when reaching the temperature limit.

User-Oriented
This 12V car battery monitor requires minimal instruction due to the intuitive interface.

The 4-button keypad makes for easy navigation. The large, backlit 2” LCD shows crisp data even under direct sunlight. Its compact size makes it ideal to keep in the glove box or in the tool box.


Easy Steps. Ready and Go!
This car battery tester is ready to work right out of the box. It’s simple, straightforward, and requires no setup. Operating is a breeze:

1. Turn off the ignition, accessories, and loads.

2. Make sure the battery terminals are clean.

3. Correctly connect the clamps to the battery terminals (Red “+” to Positive; Black “–” to Negative).

4. The BT50 will power up once it gets connected to the battery you’re testing and is ready to function.

Notice: If the battery voltage is lower than 8V, the BT50 stops the test and displays a message indicating low voltage. Please charge the battery and test again.

The battery monitor will show you one of the following results in minutes:

GOOD BATTERY: The battery is in good condition.
GOOD, CHARGING: The battery is good but has a low current; it needs to get recharged.
REPLACE: The battery is almost dead, or there is a poor connection between the battery and the tester. Replace the battery or test it again. An out-of-vehicle test is recommended for a second test.
RETEST AFTER CHARGING: Fully charge the battery and retest it. If the same reading occurs after the battery is fully charged, replace it.
BAD CELL, REPLACE: The battery is broken, interiorly damaged, or has short circuit. Replace the battery.