Overview

The CHEPQ BT309 is a professional battery diagnostic device designed for 12–24V automotive lead-acid batteries. Equipped with an upgraded 2.8-inch color display, it delivers clearer, more intuitive visual test results to help users obtain highly accurate diagnostic data. Whether for personal vehicle maintenance or professional automotive workshops, the BT309 provides reliable insight into battery condition and related electrical system performance.

Core Functions

Its functional suite includes Replay, Load Test, Data Printing, Charge Test, Battery Diagnostics, Vehicle Startup Test, and Waveform Monitoring. This combination of features allows technicians and vehicle owners to identify battery health, charging efficiency, starting system issues, and other electrical abnormalities with precision and ease.

Product Specifications

The BT309 features a durable ABS shell with a host size of 156×86×30mm and a weight of 0.31kg. It uses a 2.8-inch TFT color screen with a 320×240 resolution for clear data visibility. Compatible with 12–24V batteries, it supports a GB test range of 30–220AH and a battery CCA detection range of 100–2000. The device also accommodates multiple battery standards including CCA, JIS, GB, SAE, MCA, CA, DIN, IEC, EN, and BCI. Software updates are supported via a TYPE-C interface, and data printing is enabled (set to OK).