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This course is a part of a package deal of nine courses in electricity and electronics onboard. 

This course is about battery types and charging. The course covers types of batteries, sizes, consumer batteries, starter batteries, open/closed cells, AGM, GEL, and LI-ON.

Power to the bow thruster, anchor winch, and winch are reviewed along with cable pulls rules, including resistance in cables and batteries’ placement. 

For example, it may be a good idea to have an extra battery under the berth.

Recommendations for charging voltage, charger size, when to charge the battery, and DC-DC converter/charger for li-on batteries. 

Advice is also given on winter storage, avoiding sulphation, and when a battery needs to be replaced.