Within the Automotive Industry, Batteries are one of only a few products that need to be managed carefully due to the fact that they have a noticable shelf life.
The basics of stock management need to apply such as FIFO (First In First Out), but beyond that more needs to be done to ensure the product is sold in great condition.
Batteries self discharge over time. Due to changes in manufacturing techniques the shelf life of modern batteries are much greater than they were previously, however it is still extremely important to have a battery stock rotation and management process in place.
All battery stockists should invest in a few basic tools to keep their stock up to scratch. At the very lowest level, a good quality modern smart charger and a volt meter. Many battery stockists are now also investing in electronic battery testers based on conductance technology to be able to deal with suspect batteries and also offer free battery tests to potential customers.
There should be a periodic voltage check and recharge of all batteries in stock. If the smart charger has a recondition function, consider using this if you have had the battery in stock for a long period or if you have allowed the battery voltage to go below 12.4 Volts.
We would recommend charging any battery stock which is below 12.5 Volts. A battery of 12.4 Volts or even lower may be able to start a car, but to keep your stock in good condition we recommend 12.5V as a minimum.
If the batteries are left without regular checking and recharging they will naturally discharge and become sulphated reducing the capacity, performance and longevity of the battery. A quick "boost" charge before sale may get the vehicle started but irreversible damage may already have been done to the internals of the battery. Which would ultimately lead to a claim by the consumer as the battery has not lasted.
This would not be considered a warranty by the distributor or manufacturer as the battery has failed due to being left to sulphate and not managed properly. And likely leave the retailer out of pocket for the cost of a replacement due to mismanagement of their stock.