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How to clean a cordless power tool battery and charger?

How to clean a cordless power tool battery and charger

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Use a soft brush to clean the contacts of cordless power tools, batteries and chargers. Using a soft brush, remove dust and debris from the contacts of the cordless power tool battery and charger. Dust can reduce the connection between charger, battery and cordless power tool, reducing their performances. It is also a fire hazard.
Cooling vents of a charger need to be cleaned to keep them free of dust so the charger can charge the cordless power tool battery properly. Dust also needs to be removed from the cooling vents of a charger. It is important that the charger is able to cool the battery during charging or it will increase the length of time it takes for the battery to charge and could damage the battery.
Do not use a metal brush to clean contacts of a battery, power tool or charger because you will damage it or short circuit it. Unplug the charger before you clean it to prevent short circuiting the charger by accidentally joining the two contact terminals (positive and negative) together. Similarly, don’t use a metal brush to clean the contacts of batteries for the same reason.

How to clean corroded contacts

Corroded battery terminal can be cleaned very carefully with vinegar. Contacts can corrode if a battery is left in a charger or cordless power tool during storage or if it has been exposed to a harsh environment.
You need to be very careful not to short circuit the battery if you need to clean it. Follow the instructions below if you are cleaning a charger or a cordless power tool. If you need to clean the battery contacts, extra care must be taken to ensure you do not short circuit the battery. You can do this by very carefully cleaning and drying each contact in turn instead of cleaning them all at the same time. If you are worried, get your battery serviced instead.
Unplug the charger from the wall before attempting to clean the contacts.

Step 1 – Remove electrical input

Unplug the charger from the mains supply and remove the battery from the charger or cordless power tool.

Wash the corroded contacts of a cordless power tool battery or charger with vinegar on a cotton bud.

Step 2 – Clean contacts with vinegar

Use a cotton bud dipped in vinegar (any sort will do) to rub at the corrosion on the contacts until the corrosion is loosened and the metal underneath polishes up.

Wash the vinegar off the cordless power tool battery and charger with water.

Step 3 – Clean contacts with water

Wash the vinegar away with clean water using another cotton bud. The vinegar is an acid so needs to be removed thoroughly or it will corrode the contacts itself.

Use a hair dryer to dry the contacts thoroughly before using the devices again.

Step 4 – Dry the contacts

Air dry or use a hair dryer to dry the contacts. It’s essential that they are completely dry before the device is used again.

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