FAQ - Help Desk

1. MF
   The most commonly used battery type. Maintenance-free, requiring no maintenance such as electrolyte topping up.
   Care should be taken when tipping, as electrolyte may leak out.
   In Korea, MF batteries usually refer to products with JIS type terminals. (*Mostly used in Korea/Japan)
   You can check the status by the color of the indicator, which depends on the product.
   
   
2. MF DIN or DIN
   Like MF batteries, they are maintenance-free.
   The difference is that it has DIN type terminals, which are recessed downwards compared to JIS type. (*Mostly used in Europe)
   
   
3. AGM
   The battery uses a special glass fibre board, which also requires no maintenance such as replenishing the electrolyte.
   Thanks to a special seal, there is no risk of electrolyte leakage when tipped, and there is no indicator.
   The difference in charge/discharge cycles, etc. shows more than three times the lifespan of MF batteries in Start/Stop (ISG) vehicles.
   It has DIN type terminals and is widely used in European vehicles as well as domestic high-end vehicles/ISG vehicles in recent years.
   
   
4. HD or CV
   Maintenance-Free/JIS,DIN batteries with high capacity for commercial/specialised vehicles (Heavy Duty).
   They are 12V, the same as regular batteries, and 24V commercial/specialised vehicles usually have two.

The color of the MF battery indicator provides an initial diagnosis of the product's health.

1. Green: healthy product
2. Black: Requires charging
3. White: needs replacement (electrolyte depletion, etc.)

However, there are some cases where the color may change temporarily, so we recommend having it checked by a professional.

Normally, you would place the terminals of the battery away from your body and judge it as L if the (+) terminal is on the left and R if on the right.

1. 20HR
   This is the most common way of calculating capacity, and refers to 20-hour rate capacity.
   Characteristics when discharged continuously at 20 hours of current until 1.75V per cell (10.5V total for a 12V battery).
   The voltage and specific gravity often drop sharply near the end of the discharge.
   
   
2. 5HR
   5-hour rate capacity, primarily referring to lighting capacity.
   The capacity of a fully charged battery at 25℃ discharged for 5HR until the voltage drops to 10.5V.
   
   
3. RC (Reverse Capacity)
   The time, in minutes, that continuous discharge can be achieved by discharging at a current of 25A until the voltage reaches 10.5V.
   The main unit is Min (minutes).
   
   
4. CCA (Cold Cranking Ampere)
   The ability to maintain a voltage of 7.2V or higher after 30 seconds of discharge initiation when discharged at a cold cranking ampere(CCA) at -18°C.
   It is difficult to determine if a battery is healthy or unhealthy because it rises when it is fully charged and falls when it is fully discharged.

1. Batteries are a dangerous product that can cause electric shock, explosion, and other hazards, you should always seek professional help or know how to handle them before working on them.
   
   
2. HELLA's batteries are intended for use in passenger and commercial vehicles and are not intended for any other purpose.
   Please note that we are unable to provide after-sales service for problems arising from non-purpose use.
   
   
3. Batteries are vulnerable to high temperatures.
   Prolonged exposure to high temperatures can cause the electrolyte to evaporate, reducing its lifespan.