Is Your Boat's Battery Ready For Its First Replacement?

Recreational boaties are being asked one simple question before they launch this summer: when was the marine battery last replaced?

For many Australians, the honest answer is never – and that matters more this season than any before it.

During 2020 and 2022, Australia experienced an unprecedented surge in recreational boating. Lockdowns and closed international borders drove Australians to the water in record numbers, with the Boating Industry Association recording more than 18,500 new vessel registrations in a single year at the height of the boom. Today there are more than 2.5 million Australians licensed to drive a powerboat, with close to one million registered vessels on Australian waters.¹

Marine batteries generally carry a serviceable life of three to five years. The cohort of boats and personal watercraft purchased during the COVID boom has now moved into the window when original starting batteries may be due for replacement.

For many owners preparing to launch for the 2026-27 summer season, the starting battery fitted when they bought the vessel has never been tested, never been charged professionally, and may no longer be reliable on the water.

What Are the Risks?

• A failing marine battery does not always give clear warning at the boat ramp. A battery can have just enough charge to fire the engine at launch and still lack the reserve capacity to run navigation electronics, bilge pumps, or other safety-critical systems once underway.
• A battery that has sat in a stored vessel over winter without a maintenance charger is particularly vulnerable – the extended discharge causes permanent capacity loss that standard use will not reverse.

How to Check Your Marine Battery Is Summer-Ready

• Have your marine battery tested by a specialist, particularly if the vessel was purchased between 2020 and 2022 and the battery has never been replaced. Battery World offers free marine battery checks which take only five minutes at more than 119 stores nationwide.
• Confirm the battery was properly maintained over the off-season. A battery stored without a maintenance charger will have lost capacity and may not perform reliably offshore even if it appears to start the engine normally.
• Know the warning signs of a battery approaching end-of-life: slow engine cranking, electronics that cut in and out, or a battery that loses charge faster than usual between trips are all worth investigating before the season begins.
• Consider carrying a lithium jump starter as part of onboard emergency equipment. It is compact, effective, and could make the difference between a self-rescue and a call for assistance. These are lifesavers if your battery fails to start when you're out at sea.
• Do not treat engine start as confirmation of battery health. Starting performance and reserve capacity are different things, and what a battery does at the ramp is not necessarily what it will do two hours offshore.

Battery World's local battery experts can test, fit and recycle marine batteries, and with nearly 30 years of experience as Australia's leading battery retailer, they are the specialist resource every boatie should visit before the season gets underway.

Before you launch this summer, visit your local Battery World store for a free marine battery check.

¹ Boating Industry Association, 2026 Boating Data Report Card.