We share examples of troubles that have occurred in the past to illustrate how to use batteries safely.

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When storing batteries, they need to be properly placed inside the specified tray to ensure batteries do not come into contact with one another. Here is an example of what has actually occurred as a result of storing batteries improperly.

When storing batteries, please place them properly within their specified tray to ensure they do not come into contact with one another.

Let us take a look at examples of quality issues due to decline in battery voltage and consumption of electrical capacity.

In some cases, tabbed batteries and coin-type lithium batteries used for memory backup have come into contact with conductive anti-static materials and formed external discharge circuits. This has led to decline in battery voltage and consumption of electrical capacity.

Factories that produce semiconductor components, such as integrated circuits (IC) and large scale integrated circuits (LSI), thoroughly employ conductive anti-static materials throughout to prevent static electricity. These are widely used as storage materials. Many conductive anti-static materials are made from materials such as carbon, aluminum foil, and metals, which gives them excellent conductivity. Some example uses are as packaging bags, trays, mats, sheets, films, cardboard boxes, plastic cases, etc.

For instance, some protective materials have electrical resistance values as low as 103 to 106 Q/cm. When the positive and negative terminals of batteries touch these protective materials, they begin to discharge currents on the order of several milliamperes to several amperes. This causes voltage decline and consumption of electrical capacity.

When using batteries near protective materials, please take care not to let the positive or negative terminals of the batteries, or the printed circuit boards to which the batteries are mounted, come into direct contact with the protective materials.

In some cases, tabbed batteries and coin-type lithium batteries used for memory backup have come into contact with one another and formed discharge circuits (short condition). This has led to decline in battery voltage and consumption of electrical capacity. Please observe the following points when handling batteries.

(1) Remove the batteries from the tray one at a time.

If you remove the batteries all at once, such as by flipping over the tray, the batteries may touch one another and form discharge circuits.

(2) Do not jumble batteries together in a parts box or other receptacle.

Multiple batteries may form discharge circuits which will consume the batteries.