A well-maintained battery is the foundation for a reliable and safe boating experience. Whether you have a lead-acid, AGM, or lithium-based battery, the same basic principles of care and maintenance apply.
Charging & Maintenance
- Always charge the battery immediately after use – avoid deep discharge
- Use a smart trickle charger (e.g., CTEK) during winter storage
- Maintain a charge level between 50–100% for optimal lifespan
- Avoid overcharging – choose a charger with automatic temperature compensation
Cleaning & Inspection
- Regularly check the terminals for oxidation and corrosion
- Clean the terminals with a solution of baking soda and water (1 tbsp per dl)
- Apply terminal grease or contact spray to the terminals after cleaning
- Ensure all cable connections are tight and in good condition
Winter Storage
- Store the battery in a cool (5–15°C), dry, and frost-free place
- Always disconnect the battery from the boat for extended storage
- Charge to 100% before storage and check every 4–6 weeks
- Avoid storing directly on concrete – use a wooden board or plastic pallet
Safety
- Always work in well-ventilated areas – batteries emit hydrogen gas when charging
- Wear protective gloves and safety glasses when handling battery acid
- Keep open flames, sparks, and cigarettes away from the battery
- In case of acid leakage – neutralize with baking soda and rinse with plenty of water
Signs that the battery needs replacing
- Doesn't hold a charge for more than a few hours under normal conditions
- Visible swelling, cracks, or leakage in the casing
- Voltage drops quickly under load (below 12V)
- The battery is older than 4–5 years and performs noticeably worse
