Even a maintenance-free battery sometimes requires a refresh. In many cases, these units lack external access points, meaning the technician may need to create access by carefully drilling small holes. The goal is to restore function without compromising the battery’s integrity or safety, and to do so with proper planning and precision. When holes are drilled, attention must be paid to the size, location, and method to minimize stress on the casing and to prevent leakage of corrosive electrolyte. Adequate ventilation and eye protection are essential throughout the process, and all work should be conducted in a clean, dry environment to reduce the risk of short circuits or damage to surrounding components.
After the modification, it is advisable to seal the openings with a suitable automotive-grade material that can dampen vibration while resisting chemical exposure. A product designed for automotive vibration isolation can be an excellent choice because it adheres well to metal surfaces, remains flexible under temperature changes, and forms a durable seal that protects the interior from dust, moisture, and acid traces. The sealing material should bond securely to the chassis and maintain its properties over time, ensuring the repair remains sound even under typical driving conditions.
P. Ovchinnikov, Krasnoyarsk
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