Factory : Ağır Sanayi Bölgesi Best İlerisi - BALIKESİR

Frequently Asked Questions

What is a battery?

     Battery is basically an object that converts electrical energy into chemical energy and stores and uses it when needed. All batteries are structurally similar and consist of a group of electrochemical cells. Each cell consists of a positive and a negative electrode and a separator. Each battery has a service life, which may vary depending on the quality and manufacture of the battery. A battery draining too fast or causing problems in time indicates that the battery has reached the end of its life cycle. Depending on the quality of the battery used, the electrical consumption of the vehicle, weather conditions, the waiting time of the vehicle in parking lot and the inactivity of the vehicle for a long period of time, the battery may die. Battery may drain for several reasons such as fast discharge of the battery, not driving vehicle for a long time, heavy use of systems such as electricity, radio-CD player in the vehicle or forgetting the headlights on.

Instruction for Use of Battery

  • Battery surface should be dry and clean. A damp and dirty   battery surface causes the battery to discharge automatically. This is called self-discharge. To prevent self-discharge, battery  surface is washed with soda water, flushed with water and allowed to dry. If fast drying is desired, it is wiped with a cloth with water absorption. Compressed air is not used for this purpose.
  • At every technical service check-up, make sure that the tightness or oxidation status of the battery terminal clamps are checked. Oxidation prevents normal operation of the starter motor, especially in cold weather. In the case of oxidation in the clamp, wash the terminal with hot water to remove oxidation. A thin layer of petrolatum is then applied on the terminals. Petrolatum gives better results against oxidation than grease. Note that the loose clamp may cause the terminal to melt and the battery to burn, and extra resistance resulting from oxidation will cause the battery to not charge.
  • Battery fastening connection should be tightened at a normal level. Battery fastening connection should not be loose and the fastening screws should not be overtightened. Overtightening the setscrews will damage the battery pack.
  • Make sure that the holes on the element dust covers are open.
  • The electrolyte level in the elements should be normal. Water in the electrolyte evaporates over time, causing the level to fall. When the level falls, it is refilled by adding only pure water to cover the plates for 1 – 1.5 cm. For a well-maintained battery group, please visit your authorized service quarterly to have the electrolyte level of the battery checked. For neglected battery group, in case of more than 20,000 km per year, get your battery checked by authorized service at quarterly intervals.
  • Make sure that the battery voltage is checked during the technical service. Performing this check 1 hour after the engine has cooled down will allow you to see the actual voltage level of your battery. If the voltage level is between 12.40-12.60 volts, remove the battery for 3-6 hr 1/20 Cn (charge the battery with 1/20 of its capacity). Note the end-of-charge battery voltage level after allowing the battery to rest for 1 hour. If battery voltage level is > 12.70 V, you may terminate the charging process.
  • Batteries of vehicles that are not driven continuously should be charged once a month to prevent sulphation of the battery.

Battery Service Instructions

Battery Selection and Installation:

  • Select the appropriate battery for your vehicle from the “select battery” field.
  • Check the voltage and density values before connecting the battery to your vehicle. The voltage should be higher than 12.60 V; otherwise, recharge it. Density should be higher than 1.270 g / cm3 at 27 °C.
  • Check the battery voltage with voltmeter to make sure it is correct. Improperly connected terminals will severely damage both the battery and your vehicle’s electrical system.
  • Carefully check and clean the wiring and battery tray and place the battery.
  • Connect the positive (+) cable and then, the negative (-) grounded cable. If the connection is too tight, the terminal will break and if the connection is not tight enough, an arc will form.
  • Coat the terminals and cable ends with an anti-corrosion agent (petrolatum or fine engine oil).

Battery Measurement and Charging Process:

  • Charging time for de-cordable batteries is between 20° – 35°C, depending on the electrolyte density in all cells, which should be 1,280 g /cm3. Charging is terminated once this value is reached. Rest it for half an hour before connecting to the vehicle.
  • Multiple batteries of the same capacity may be charged simultaneously.
  • Overcharging shortens the life of battery.

When charging:

  • Make sure the charger is off.
  • Determine the charge level in the battery.
  • Connect the battery to the charger so that the positive cable is hooked up to the positive terminal and the negative cable is hooked up to the negative terminal.
  • After charging, turn off the charger before disconnecting the terminals.
  • Measure open circuit voltage and inspection hole densities to determine whether additional charging is required (It should be “> 12.60” for full charge status).

Green color indicates that your battery is charged.

Black color indicates that your battery needs charging.

No color indicates that you should add pure water to your battery.

Stocking Up Battery:

  • FIFO principle is applied in stocking. Batteries should be sold according to the “First In, First Out” principle considering the charge date of the battery.
  • Storage areas should be a cool, dry, moisture-free environment with a maximum temperature of 25 °C. Each 10 °C increase reduces shelf life by 50%.
  • Batteries should not be stored under direct sunlight or snow.
  • Batteries should be stored in a flat position with styrofoam in-between. When pallets are used, two rows on top of each other may be stored.
  • At 25 °C, Ca-Ca maintenance-free aqueous rechargeable accumulators can be stored for 6 months and Hybrid batteries can be stored for 3 months without losing any charge.
  • Batteries should not be stored in discharged state; otherwise, they will be damaged.
  • Do not allow acid to overflow during charging or temperature to rise above 52 °C. If the temperature rises, reduce the charging current or disconnect the battery until the battery cools down. High charging temperature will damage your battery.

Safety Measures:

  • Charging areas should be ventilated.
  • They should be kept away from sources of ignition such as sparks, flames, cigarettes, welding, etc. to prevent fire and explosion of hydrogen gas generated in the battery.
  • Wear safety goggles, masks and gloves when working with the battery against the risk of acid splashing. Do not tilt aqueous batteries for more than 45 °C. In case of contact with acid, first dry with a cloth, then wash with plenty of water.
  • Keep the battery and electrolyte fluid away from children.
  • Allow the acid to rise to 15 °C before connecting a frozen battery to the charger.
  • In order to prevent sparks during maintenance, it is necessary to first disconnect the grounded cable and then, re-connect it in the final step.
  • When removing a battery from the vehicle, first remove the negative (-) and when installing the battery in the vehicle, first connect the positive (+) terminal.
  • Pay particular attention that the battery is mounted so as to prevent vibration and the connections are tight. Thus, vibration-induced malfunctions can be minimized.

Battery Problems and Solutions

  • If your battery is not operating at all, either the battery is discharged or there is a fault in itself. Replace with a new battery.
  • If there is strain in the starter, the battery may be drained. In this case, the battery can be charged.
  • If your battery drains too fast and frequently, short-circuit or sulphatization may occur in the battery. Check the charge level of the battery.
  • If acid is draining from the covers, reduce the liquid level in the battery.
  • If the battery overheats during use, your vehicle may be charging with high voltage. Therefore, please have your vehicle’s charging system checked.

What are the Warranty Terms?


  1. The warranty period starts from the date of delivery of the product and is valid for 1-2 years.
  2. The entire product, including all components, are under the guarantee of our company.
  3. In the event the product breaks down within the warranty period, the time spent for repairs will be added to the warranty period. The repair period of the product may not exceed 20 working days. This period will commence on the date the malfunction is notified to the authorized service or where no service station is available, to one of the vendor, dealer, agency, representative office, importer or manufacturer-producer of the product. A consumer may notify the malfunction by telephone, fax, e-mail, registered mail or a similar way. However, in the case of dispute, the burden of proof lies with the consumer. If the malfunction of the product cannot be repaired within 10 working days, the manufacturer or the importer has to provide the consumer with a different product of similar features until the repair is completed.
  4. In case of malfunction of the product within the warranty period due to material and workmanship defects or incorrect installation, it will be repaired without charging any fee such as labour cost, price of the replaced part or any other price under any title whatsoever.
  5. Although the consumer exercises his/her right to repair and the product:

-Malfunctions at least four times within one year during the warranty period, starting from the date of delivery to the consumer or six times during the warranty period determined by the manufacturer-producer and/or importer, and also if it becomes permanently impossible to make use of the product due to these malfunctions,

-The maximum period for repair is exceeded,

-If the service station of the company or – if the service station is not available – one of the seller, dealer, agent, representative office, importer or manufacturer-producer, respectively determines based on a report that the repair of the malfunction is not possible, customer may demand free replacement of the product or refund or a discount rate in proportion to the defect.

  1. Malfunctions arising from incorrect use of the product against the points indicated in the user’s manual of the product are excluded from the warranty.
  2. In case of disputes relating to the warranty, consumer may apply to the General Directorate for Consumer Protection and Market Surveillance of the Ministry of Customs and Trade.


ERDİL BATTERIES and all their components are under the warranty of our company for 1 year (12 months) – 2 years (24 months) provided that the conditions of warranty and the user manual are complied with.

  • Our accumulators are starter lead-acid accumulators, conforming to TS EN 50342-1 standard. Such accumulators will be excluded from the warranty if they are used for different purposes.
  • If the accumulator malfunctions, it should be immediately taken to the service support unit, together with its WARRANTY CARD and without draining the electrolyte.
  • Hardening in the battery due to faults and malfunctions in the electrical equipment of vehicle (starter, alternator, connector, leakage in the electrical installation, permanently lit lamp, etc.) and hardening, sparks and short-circuits due to the operation or idling of overcharged vehicle and any explosion due to loose connections, battery and vehicle damages caused by reverse connection of the battery, wear out caused by wrong acids, water and other foreign substances placed by any third party other than the authorized dealers of ERDİL AKÜ, damages resulting from external effects (direct sun  and rainfall exposure, freezing and impacts, unsuitable to vehicle) The battery failures in case of a separate output from any of the batteries in vehicles that use double batteries and the applications made for the pole head box-cover fractures and cracks after the battery has been inserted into the vehicle with early wear caused by the selection of the battery will not be covered by the WARRANTY .
  • If an accumulator has been brought to an ERDİL AKÜ authorized dealer due to malfunction and the user has acted in accordance with the instructions for use, the defective battery will be sent to our factory with a report indicating malfunction to be issued by our dealer.
  • If it is determined as a result of the inspection on the battery in the main technical service that defective batteries have been produced within the warranty period as of the date of sale will be replaced with an equivalent new battery.
  • Only SCRAP VALUE of batteries that fail due to usage error will be refunded or the battery will be returned upon request of the customer.
  • Charging of the vehicle-discharged batteries is carried out by the services for a fee.
  • The warranty period is 12 months without a mileage limit for commercial sales. This class includes commercial taxis, minibuses, buses or passenger vans.
  • The guarantee period for commercial taxis is 12 months if the taxi battery is used. Batteries other than the Taxi battery will be excluded from the warranty for commercial taxis and the warranty terms will not apply.
  • If intercity buses use the bus battery, the warranty period will be 12 months. Batteries other than the bus battery will be excluded from the warranty and the terms of warrant will not apply.
  • Especially LPG vehicles and vehicles with additional auxiliary equipment such as radios, telephone, television and alarm, etc. must select a battery with a greater capacity than the normal. Warranty will only apply in these cases.
  • During the periodical maintenance of the accumulator, no labor fee or similar will be charged for the service provided. However, charging and maintenance expenses to be incurred due to vehicle-related problems (refill) do not fall in this scope. The warranty terms will not apply to the batteries of vehicles that do not comply with the periodical maintenance conditions (maintance for at least once in the first 6 months and at least three times in the first 12 months).
  • The warranty period of the battery replaced during the warranty application will be limited to the remaining warranty period of the previously purchased battery.

(*) Warranty period for commercial sales is 1 year (12 months).

(*) Warranty period for private vehicles is 2 years (24 months).

You can call us for more information about our products and services: