Prolonged electronic diagnostic work on modern vehicles can drain or destabilise the battery, leading to lost ECU data, failed resets, and unreliable readings. The Sealey SPBC30 Battery Support Unit and Charger solves this problem in one compact unit. Its 13.5V DC battery support mode delivers a continuous 30A supply to hold battery voltage stable throughout diagnostic sessions, while its fully automatic 7-stage charging function handles 6V, 12V, and 24V batteries including EFB, AGM, GEL, lead acid, calcium, and stop/start types with auto chemistry selection so the correct charge profile is always applied. A dedicated selection button also enables lithium battery charging. The zero-volt charging function allows recovery of completely discharged batteries, provided any load has been removed, and the sulphation repair mode works to restore older or neglected batteries. With a 30A charge output at 6/12V (16A at 24V), it is suitable for battery capacities from 60Ah to 300Ah. The intuitive