On finger and little finger batteries, you often see an inscription that they are not rechargeable. The exact same mark is on square batteries, giving a voltage of 3, 7 V or 4.5 V. This is not entirely true. The battery is completely out of order only in two cases, if its electrolyte is completely dry or one of the electrodes is destroyed. Otherwise, the battery life can be extended.
It is necessary
- - battery charger;
- - avometer or multimeter.
Instructions
Step 1
If the batteries were, for example, in a digital camera and at some point the indicator showed a signal that they are low, remove them and check for residual voltage. It can be zero. Nothing can be done with such batteries. But if your device has recorded a voltage that can be up to 50% of the voltage of a fresh cell, you can try to recharge the battery.
Step 2
Use a standard battery charger of the correct form factor to recharge. Recharging must be carried out by controlling the temperature of the battery and the charger case by hand. The battery may feel warm to the touch, but should not get too hot. Charging should not take more than two hours.
Step 3
It must be remembered that batteries are referred to as dry cells. The boiling of the electrolyte in them, which is in a viscous state, can lead to swelling of the element and even its rupture. Therefore, you recharge at your own peril and risk. It can be carried out repeatedly, but each time the capacity of the element will drop by about half. Therefore, charging it more than twice is impractical.
Step 4
An important condition for the regeneration of dry cells is their incomplete discharge during operation. It must also be remembered that a completely dry battery will not recharge. Therefore, the battery will last longer if it is stored and operated at temperatures from +10 to + 30 ° C or at temperatures corresponding to the passport value.
Step 5
Sometimes you can squeeze the body with pliers or deform it in some other way. This helps because the oxide layer near the negative electrode is broken. However, such a deformed battery may not fit into the container of the device intended for it. It can also lead to leakage of electrolyte and damage to the device. This method was very effective for the batteries that powered Soviet flashlights and portable tape recorders. Batteries were not always available back then, and the containers for these devices were very large.
