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What causes battery failure?

Battery Application and Installation

The battery is not being used in the application for which it was designed
The battery is not sized properly for the application
The vehicle has excessive electrical accessories
The battery is not properly fitted into the vehicle
The battery cables are not clean
The battery cables have not been properly adjusted to fit the battery terminals

Battery Service and Maintenance

The vehicle’s electrical system has been repaired or altered
The vehicle has been stationary for a long period of time
The vehicle has been brought in from or driven in another part of the country for a long period of time

Visual Inspection of Battery

Terminals show signs of having been hammered, twisted or driven down into the cover
Side terminals show signs of over-torquing
Container or cover show signs of stress, damage or high temperature.
Ends of the battery are pushed out indicating plate growth