Recently the Service Department has received a number of calls from customers reporting that their boat battery is dead and since it is within the warranty period, fell a replacement battery should be provided. Although it is true that batteries, both for boats and Sea Doos do have a warranty period, this warranty only covers a demonstrated "defective" battery. The warranty does not cover a battery that fails to perform due to poor maintenance.
On most recently built watercraft, there are a limited number of circuits that draw on a battery even while the ignition is off. If left unchecked, these batteries will eventually go flat and once left flat for a relatively short period of time will no longer be able to be charged. This failure is not covered under the battery warranty.
Any boat equipped with a battery switch should have that switch turned to the "off" position each time the boat is left unattended. Most automatic bilge pumps are wired directly to the battery and if that pump comes on due to rain water in the bilge, that battery will go flat and will not be able to be recharged. That is not a warranty issue.
It is strongly recommended that every boat have an "on board" battery charger and that the boat remains plugged-in when left unattended.
If a battery charger option is not desired, the boat owner should investigate the replacement of their existing battery with a dual purpose "deep cycle" battery. The dual purpose battery can be discharged and recharged repetitively.
There is no alternative to proper battery maintenance. Boats, like cars, should be started on a regular basis, if for no other reason than to provide the battery with a needed recharge.