Proper battery maintenance can double or triple battery life. Here's everything you need to know.
Battery Types
| Type | Maintenance | Best For |
|---|---|---|
| Flooded Lead-Acid | High (check water) | Budget, starting |
| AGM | Low (sealed) | Deep cycle |
| Lithium | Very Low | High performance |
Monthly Tasks
- Check for terminal corrosion
- Look for case cracks or bulging
- Ensure secure mounting
- Clean terminals with baking soda solution
- Check water levels (flooded only)—use distilled water
⚠️ Safety
Wear safety glasses and gloves. Batteries contain acid and produce explosive hydrogen gas.
Charging Best Practices
- Use marine-specific smart charger
- Don't overcharge or undercharge
- Match charger to battery type
- Avoid deep discharge (not below 50%)
Storage
- Fully charge before storage
- Disconnect from boat
- Store cool and dry
- Connect to maintenance charger
See Winterization Checklist and Electrical Upgrades Guide.
Find marine electricians through Boatwork.
