Terminal Type

Cell Layout (Polarity)

Base Hold Down

What is a dry charged battery and how is it different from a factory-filled one?

A dry charged battery leaves the factory without electrolyte. Its plates are fully formed, washed, dried and sealed in a charged state, so the battery keeps its power during long storage. A factory-filled battery is filled and charged before delivery and must be installed sooner. The WESTERN Dry Charged range therefore ships dry, which simplifies transport and storage, and is activated on site simply by filling it with electrolyte.

Do I need to add electrolyte before installing a JIS dry charged battery?

Yes. Fill each cell with dilute sulfuric acid of the specified density, typically 1.28 g/cm³ at 25°C for JIS applications, then let the battery stand for about 20 to 30 minutes so the plates absorb the acid. Check that the level reaches the upper mark, fit the vent plugs and the battery is ready for service. For fleet installations, a short first charge restores full starting reserve after long storage.

What do JIS model names like NS40-32B20R and N100-95E41R tell me?

The leading code, NS40 or N100, indicates the JIS case class, and the number that follows, 32 or 95, is the rated capacity in Ah. The size code B20 or E41 identifies the case dimensions in the table, and the final letter R or L marks the polarity direction of the terminals. Matching these four elements to your old battery lets you select the correct replacement from the WESTERN Dry Charged line in seconds.

How long can a JIS dry charged battery be stored before activation?

Because the plates are dry and sealed, a dry charged battery can normally be stored for one to two years in a cool, dry place with only a small loss of first-charge performance. Keep the sealing strips in place until filling, store the battery upright, and protect it from direct sunlight and humidity. Always fill with fresh electrolyte of the specified density when the battery is commissioned.

What maintenance does a JIS dry charged battery need after commissioning?

After activation, keep the electrolyte level between the upper and lower marks and top up with demineralized water only. Check the charge state regularly, especially in vehicles with short driving cycles, and recharge whenever the open-circuit voltage falls below about 12.4 V. Clean the terminals and confirm the hold-down is tight, and the battery will deliver reliable JIS-standard starting performance.