EV and Hybrid Battery Systems
Electric vehicles use two different battery systems, each serving a distinct purpose. This page covers both the main high-voltage drive battery, which powers the electric motor, and the 12V vehicle battery, which supports the car’s control systems, safety features, and electronics. Although they work together, they are diagnosed, tested, and maintained in very different ways.
Main Drive Battery (High Voltage)
The main drive battery is the high-voltage battery pack that powers the electric motor and moves the vehicle. It operates at significantly higher voltages than a conventional vehicle battery and is managed by complex control systems designed to regulate temperature, charging, and performance.
At Shaikly EV Specialists, we assess high-voltage batteries using manufacturer-level diagnostic equipment and structured testing procedures. This allows us to identify issues such as reduced capacity, imbalance between battery modules, charging faults, or software-related problems.
Not all EV battery concerns mean replacement. Many faults relate to sensors, cooling systems, contactors, or control modules rather than the battery cells themselves. Our assessment process is designed to establish what’s actually wrong before any decisions are made.
Because high-voltage systems require specialist training and safety procedures, we only proceed where we are confident we are the right specialists for the vehicle and the fault identified.
12v Vehicle Battery
Despite being an electric vehicle, your EV still relies on a conventional 12V battery. This battery powers essential systems such as locking, lighting, infotainment, safety systems, and control modules. Without a healthy 12V battery, many EVs will not start or charge at all.
12V battery failure is one of the most common causes of EV breakdowns and warning messages. Unlike traditional cars, EVs can show a wide range of symptoms when the 12V battery begins to fail, often appearing unrelated or intermittent.
At Shaikly EV Specialists, we test the 12V battery under load and check the charging and DC-DC conversion system that maintains it. If replacement is required, we ensure the correct battery type is fitted and that the vehicle systems are reset and reinitialised correctly.