Electronics Online

Batteries must be carefully handled. Here I have briefly summarized some important rules about handling batteries properly ..

Battery care tips

Never buy batteries for stock!
During long storage battery has a certain self-discharge, and this will increase at higher temperatures. Batteries are depleted (also alkali-manganese batteries!) May leaks, it is partly demonstrated by the fact that it has been stored in the contact of a white powder (potassium hydroxide). It is corrosive and corrodes all the metal parts that come into contact with it.

The rectified voltage from the rectifier diode is not constant, because by a sine form and also from the tapped voltage of direct current affected hum. By installing a capacitor (usually elco) between plus and minus, the hum voltage will be reduced, this is because during pauses hum voltages, the capacitor provide the current and during each half period its will be charged. Hum voltage is determined by the capacity of the capacitor and current are used, it is according to the following rules:

It is often very interesting to have a matched dummy load of 50 Ohm.
Indeed it allows to adapt a PA output, or to make power measurements etc..
Several parameters are studying for a proper charge:

• power loss
• value and SWR
• etc.