Frequently Asked Questions

Following Q&A will teach you everything you wanted to know about batteries and how to optimize the usage.

This is a vibration noise which occurs when electric current flows through a transformer or a winding wire inside a component part. However, the charger may still be used without any concern as there is no need to worry from a safety point of view.
Batteries are classified according to IEC classification standards: LR03 is equal to AAA, but in another standard.
A hot battery could have several causes: from wrong storage to short circuiting. Some warmth is okay but keep an eye out for unusual heat.
Turn off the device and remove the battery immediately. Remove the remaining leakage using a cotton swab. Avoid skin contact at all times.
Batteries are best stored at room temperature. Extreme heat or cold can significantly reduce battery life.
Always insert batteries with the poles in the correct direction. Not doing so will lead to a short circuit.
The revised RoHS (Reduction of Hazardous Substances) Directive 2011/65/EU...
Perhaps you are using a different battery type. Zinc carbon will perform otherwise compared to alkaline, for example.
Replace all batteries at the same time. Do not mix old and new batteries. Use batteries from the same brand, type and expiry date too.
Use batteries for their right purpose: insert them correctly, replace them when empty and store them dry and at room temperature.