At this point Panasonic does not produce AAAA or LR61 batteries.

0006P is a 9V (square) battery and is also designated as a 6F22 (Zinc carbon) or 6LR61 (Alkaline) battery.

The revised RoHS (Reduction of hazardous Substances) Directive 2011/65/EU...

Typically for an alkaline battery is a gradually decreasing voltage when it discharges, which means that for some appliances, which need a high base voltage to operate, the appliance stops working even while the battery has still a bit of energy left.

There are different types of batteries, for instance Zinc Carbon and alkaline. If the previous battery was an alkaline, and the new ones are Zinc carbon, it is possible that the capacity and thus lifespan is less.

There can be several reasons why the appliance doesn't work. The battery can be wrongly inserted in the battery compartment, there can be a bad connection between the battery and the compartment connection terminal or it is possible the appliance does not work properly.

Always replace all batteries at once and when you replace the battery please check the battery box.

In case of skin, eye contact with alkaline solution or electrolyte from zinc carbon battery: irrigate exposed skin with clear tepid water for at least 15 minutes, if irritation, injury or pain persists, contact a physician. If there is contact with the eye, do not rub the eyes, but flush the eyes with clear tepid water for at least 15 min.

There are some best cases to keep stored batteries in best shape: store them in their original packaging, never mix up different batteries and store them at room temperature or in a cool environment.

To properly dispose the battery please consult and follow the rules of your local government.