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René Mondt
Specialist Mechanical Equipment | July 16, 2017 | 4 min. reading time

• 1. Charge the battery well with the charger you always use
• 2. Have the charger complete the entire charging program
• 3. Loosen the pole clamps
• 4. Properly clean and grease pole clamps

Before charging the batteries, check the level of the electrolyte (battery acid). If needed, replenish the battery with demineralized water up to at least 0.5 cm above the plates.

Then let the batteries “rest” for 24 hours. Optionally use an acid scale to weigh whether the battery acid has a specific weight of between 1.26 – 1.28 kg/l. Optionally also check the voltage of the battery with a Voltmeter/Multimeter. This must be above 12.6 Volt. If these values are not reached, you must charge the battery again. If the values are still not reached after that, then it there is basically no point in putting this battery into winter storage.

Clean the top of the battery with a mixture of soda and (lukewarm) water. Use a washing-up brush or paint brush for this. Then dry the lid. This avoids surface voltage leakage due to acid on the lid, which means the battery has a minimum self-discharge.  

Cleaning the pole clamps is done with the wire brush. You then grease it lightly with acid-free Vaseline. Note: do not use lubricating grease. You can then connect all clamps again except the minus cable (by not connecting the minus cable, you avoid voltage leakage and draining the battery).

Make sure this environment is properly ventilated and that no metal objects can fall onto the battery. This can cause a short circuit, spark or even an explosion.  

The interim charge is important for obtaining a longer lifespan for the batteries. Do this monthly. We do not recommend a trickle charger. It is not necessary if you follow the above steps.

The interim charge is important for obtaining a longer lifespan for the batteries. Do this monthly. We do not recommend a trickle charger. It is not necessary if you follow the above steps.

If you have developed your own “winter storage” method that works well in your situation and which you are satisfied with in terms of the lifespan of the batteries, then you can of course continue using this method.

If you work with a battery, make sure you take the appropriate safety measures. After all, battery fluid is highly corrosive. 

• Avoid skin contact by wearing gloves and always wear safety goggles. If you still come into contact with battery fluid, wash hands immediately with water and soap and/or rinse eyes with flowing water for 5 minutes and consult a doctor.
• While working with a battery, do not wear jewelry like rings, bracelets, necklaces and watches. A short circuit current can melt a piece of jewelry, resulting in severe burns.
• Prevent further shorting and ensure there is no electrical connection between the battery poles. The battery cover must be undamaged. Bare spots or dents can cause a short circuit!
  

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