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Everything you need to know about the correct storage, maintenance and inspection of batteries.

Now’s the perfect time for checking all your batteriesas well as an external equalising charge that may be necessary.

Storing and transporting batteries


  • Transport and store in an upright position, make sure your battery cannot tip over or slip.
  • Use short-circuit protection.
  • Storage conditions:
    • Store in a cool (between 0° and +25° C), dry place.
    • Keep out of direct sunlight (do not put in the display window).
    • Make sure the battery surface and terminals are clean.
  • Ensure FIFO – First In First Out.
  • Regularly check the off-load voltage (open circuit voltage) with a digital voltmeter.


Influence of higher temperatures

If batteries are exposed to high temperatures over a long period of time, this always increases water consumption and corrosion of the grids. Corroded grids are no longer able to conduct the current and the battery fails. The grid growth that also occurs can cause short circuits in the battery. 


Please note: Self-discharge speeds up when the ambient temperature is increased. Our standards

and specifications are adjusted to room temperatures of +20 to +25° Celsius and a relative humidity of 45 to 75%. According to a basic electrochemical principle, the self-discharge doubles when the temperature increases by about 10° Celsius. In this way, batteries in storage can be drained much faster due to the influence of temperature during the summer months!



In general, the following applies:

To be able to measure the open-circuit voltage with a voltmeter, you should wait for approx. 5 hours after the battery has been completely charged, or at least 1 hour without discharging.

Immediately recharge when 12.50V is reached at the latest!



Be sure to observe the following instructions in order to achieve a long battery life. 


  • Keep the surface of the battery clean and dry. 
  • Check the acid level regularly and, if necessary, top up with desalinated or distilled water up to the maximum acid level mark or 15 mm above the upper edge of the plate. Never overfill the acid level. In the case of high water loss, the regulator voltage should be checked by a technician.
  • Running Bull AGM/BackUp: Do not open AGM batteries! It’s not possible or necessary to measure the acid density or refill with distilled water!
  • Do not use any so-called enhancing agents. 


Caution: If the open-circuit voltage of a battery  drops to 12.5V, it must be recharged immediately to prevent permanent damage to the battery.  

Avoiding premature battery failure


Observe the buyer information regarding correct handling and follow banner tips to avoid premature battery failure.


Banner tips


  • The strongest possible battery in terms of capacity. Retrofit original dimension: If there is room for replacement batteries of 190mm in height, these should also be retrofitted. Make use of the battery installation recommendations from Banner – Book of Power or the battery search
  • Online upgrade Upgrading: For each battery type with an upgrade option, the Banner website now shows an upgrade recommendation for higher energy requirements (or higher cold start requirements). The performance values of the batteries can be compared at a glance and click.
  • Capacity plays a much more important role in battery life than the level of cold start current. The lower the energy density of a battery, the longer its cycle stability and service life. For this reason, the selection should be based primarily on the capacity and not on the cold start.
  • Frequent journeys over a short distance, irregular driving profiles along with stop-and-start traffic, daily cold starts in the icy temperatures last winter, additional electrical consumers such as heated seats and parking or rear window heating have lowered the energy level of your battery start for start and journey for journey. Treat your battery to an extra boost now! External recharging. At the latest always coordinate with the tyre change in spring or late autumn.
  • If auxiliary electrical consumers are installed in the vehicle at a later date (sound system, parking heater, …) we recommend an alternative use of Running Bull AGM batteries.