The BT201 is a 12V car battery tester for car owners and technicians, quickly reading voltage, internal resistance, cold cranking current, and battery health for faster repairs. It supports various battery types, including flooded, AGM, and GEL, with capacities from 100 to 2000 CCA. To use, turn off the engine, connect the red clip to the positive terminal and the black clip to the negative; the device powers on automatically. Ensure the key is off and all electrical equipment is turned off during testing. If the voltage is high, turn on the headlights for 2-3 minutes, then retest when the voltage drops.
Product Detailed Parameters
Brand Name |
Lonauto |
Model Number |
BT201 |
Type |
Battery Tester |
Applicable Models |
OBDII Protocols Vehicle |
Power |
24W |
Warranty |
12 Months |
Operating environment |
-20 ℃ ~ 60℃ |
Storage temperature |
-20 ℃ ~ 70℃ |
Dimensions |
128.5*72.5*22.2mm |
weight |
300g |
Languag |
English, German, French, Portuguese, Italian, Russian |
Packing |
Box Packing |
BT201 is a 12V car battery tester, suitable for car owners and car maintenance technicians.
The battery tester can quickly read important car battery data, such as voltage, internal resistance, cold cranking currentand battery capacity, battery health and state of charge.
The ability to provide accurate test results,


Calculate the battery’s cold-cranking capability and age,allowing for faster and more precise vehicle repairs.
The BT201 can detect ordinary flooded batteries with a capacity of 100-2000 CCA, AGM flat plates, AGM spirals, and GEL batteries.
Turn off the engine, connect the red clip of the tester to the positive terminal of the battery and the black clip to the negative terminal of the battery, the device will automatically power up and be ready to test.
If you are testing the battery in the car, do not insert the key or keep it in the off position. Make sure all electrical equipment is turned off.
If the battery voltage is higher than normal, turn on the headlights for 2 to 3 minutes, and check the battery when the voltage drops to normal.
