Ca-Ca maintenance-free flooded charged batteries and hybrid batteries can be stored for 6 and 3 months respectively. Batteries will be damaged if stored in discharged state. All batteries should be stored in a cool and dry location; for flooded batteries, separators (e.g. styropor) must be used if they are to be stacked. Battery surfaces should be clean.

First In-First Out principle should be adopted. Production and storage dates should be included on stacks.  For example, code number 280421 on a battery means that it was manufactured in the production line 2 on 21 April 2008.

Recharge requirement for calcium Ca-Ca flooded batteries:

• Once in every 6 months if average storage temperature is below 27 degrees (*)
• Once in every 3 months if average storage temperature is above 27 degrees (*)
• Battery needs to be recharged when its open circuit voltage drops to 12,4 volts. This method is alternative to methods 1 and 2.
• These periods are approximately ½ for hybrid flooded charged batteries.

ATTENTION: Do not allow acid spillage and temperature to exceed 52 degrees during recharging. If the temperature increases, lower the charge current and stop charging until the battery cools down. High charging temperature damages the battery.


Always check the following conditions when inspecting a battery:

• Loose, displaced or torn terminals
• Cracked-broken case or cover
• Displaced, broken or obstructed plug holes, clogged gas output holes
• If the battery is not damaged, proceed to the next step.

Measuring Charge Level:

Measure open circuit voltage with a precision voltmeter.

NOTE: Never measure the charge level of a battery that is still in the vehicle or has just been taken out from charging.  These situations provide a false high voltage surface charge. In order to eliminate surface charge, discharge the battery by using 15x15A or keeping the headlights on for 15 minutes if it is in a vehicle.

If the charging state;

If the battery is charged for at least 75% (approximate voltage=12.4 *V), proceed to the load test; if it is below 75%, recharge it according to the specified method before the load test. Voltage and intensity values may vary depending on the battery design.

Load Test:

Battery test under load and evaluating the results depend on the systems of devices used. Load test and results evaluation are carried out as per device instructions.

Inspecting Vehicle’s Electrical Equipment:

Inspect the vehicle’s related electrical equipment when installing a new accumulator or in case of a faulty battery. Most common error in vehicles is over-charging or under-charging. Apply full throttle with a regular battery and check whether alternator output voltage is between 13,8-14,4 volts for hybrid batteries; 13,8-14,9V range is acceptable for Ca-Ca accumulators.  (for 12V vehicle)

NOTE: For vehicles where disconnecting the battery causes a blackout for electronic circuits and coding, prevent shutdown of the system by connecting a second battery or by activating a special device before disconnecting.

Charge level with 1,280 initial electrolyte at 27°C

% Approx. Charge    Open Circuit V.     Approx. Intensity
100                          12.6 V                  1.280
75                            12.4 V                  1.240
50                            12.2 V                  1.200
25                            12.0 V                  1.160

Note: Disconnecting the battery will cause blackout in electronic systems; an auxiliary power connection can be made using car lighter outlet to prevent it.


Charging duration for batteries with opening plugs (cover) depends on the electrolyte intensity level in all cells to be 1.280 g/cm3 between 20°-35°C. Charging stops when this value is reached. The battery is rested for 30 minutes, electrolyte level is set to maximum line, its surface is wiped and installed in the vehicle. Batteries stored as flooded charged or discharged accumulators came from customers are charged depending on their charge levels in addition to currents and durations given below. However, used batteries may not reach the desired intensity level. Unless the corrected intensity changes during the last two hours of charging process, applied charging amount is considered sufficient.  For fully closed batteries without opening plugs, charging is applied according to voltage values.

• Ensure that charging device is not activated.
• Determine charging level of battery.
• Connect the battery to charging device. Positive to positive, negative to negative. Take care not to make terminal connection in reverse.
• Choose current and voltage values according to charging device’s specifications and instructions, and start charging.
• Turn off the device before disconnecting terminals.
• Measure open circuit voltage and intensity values to see if additional charging is required.

Open Circuit Voltage = 11.70V-12.40V

Open Circuit Voltage =< 11.70V

Battery Capacity (Ah) Charging Duration
• You can charge multiple batteries with the same capacity simultaneously.
• Discharged batteries freeze in lower degrees in cold weather (-5 degrees -10 degrees)
• Do not attempt to charge a frozen battery; ensure that it is at room temperature before charging.
• Over-charge shortens the life span of the battery.


Choose a suitable battery for the vehicle to be used through the lists on our catalogue specifying battery features. The most important criteria are size, cold starting current and capacity values. Flood dry batteries using the method above and charge if necessary.

If open circuit voltage of flooded charged batteries is 12.50 Volts or below when average  temperature is less than 4 C, recharge using the method above.

If ambient temperature is high and open circuit voltage is 12,40 volts or below, recharge using the method above.

Before disconnecting the old battery, mark the cables as +/- in order to connect the new one accurately.

Ensure that the battery voltage value and direction are correct by measuring, check carefully and clean cable connections and the battery table. Insert the new battery, connect the cables and tighten. Connect the positive (+) cable first. Connect the negative (-) ground cable later. Tighten carefully. Be extra careful when tightening battery terminals as over-tightening damages terminals.