If a motorbike is used regularly & a few basic checks are performed once a month, a motorbike battery should be serviceable for at least 3 years. Maintenance free & gel filled batteries require very little maintenance once they have been correctly charged & installed.

However, it is worth remembering that, due to their size, motorcycle batteries can be very temperamental if not properly maintained & will not take much abuse. Correctly charging your battery & checking the battery at least once a month will usually ensure trouble free usage.

Based on numerous years of experience with motorcycle batteries, we have found that a faulty motorbike battery will usually either fail within the first month or won’t function correctly from the start. Most motorbike batteries that fail after a month have failed due to being incorrectly charged or due to being abused.

The return rate for genuinely faulty motorbike batteries due to manufacturing faults is less than 1% (this will probably be much higher in no name and cheap batteries).
It is worth noting that most motorbike battery warranties only cover manufacturing defects or faults, not abuse by the owner or failure to keep the battery charged or maintained.