How to use Ni-MH rechargeable batteries correctly?

How to use Ni-MH rechargeable batteries correctly If you have very few AA and AAA devices in your life, you can at least consider investing in rechargeable batteries. With the popularity of wireless devices, nickel-metal hydride batteries are becoming more and more popular. This is a good thing. Rechargeable batteries are a good idea: it can save you the trouble and money of buying and reusing waste products, and it can also keep these disposable batteries away from landfills. How does a nickel-metal hydride battery work? A nickel-metal hydride battery consists of two metal strips, which act as a positive electrode and a negative electrode, respectively, with an insulating diaphragm in between. The positive electrode is usually made of nickel (a negative electrode of a metal hydride), so it is called nickel metal hydride or nickel metal hydride. However, when these depleted batteries are placed in a charger, the current will reverse and discharge. The electrons are pulled out of the positive electrode, oxidizing and releasing hydrogen. At the same time, electrons are put back into the negative electrode and absorb hydrogen. In the case of overcharging, any excess hydrogen will be discharged from the top of the battery. Look carefully at the lid of the charger and you will see the vent. How nickel-metal hydride batteries keep batteries healthy When it comes to rechargeable batteries, two terms are controversial: memory effect and voltage drop. Even a quick search will find conflicting information about these two phenomena, but few scientific experiments can confirm them. To make matters more complicated, these two problems are scapegoats, and any type of battery failure is often blamed on them. So what are these problems, do you have to worry about them? There is no memory effect. This is just a problem with nickel-cadmium batteries. Even so, it is difficult to replicate. On the other hand, the voltage drop can occur in nickel metal hydride batteries, wherever it may be significant. When the battery is overcharged many times, small crystals form on the electrodes, inhibiting their ability to carry out important chemical reactions. As a result, the battery voltage drops. Even if the drop does not affect the battery capacity, it will cause the device to think that their battery is losing power at a faster rate than it actually is. In both cases, the standard recommendation is to fully discharge and then recharge. Although this is a good cure for memory effects (nickel-cadmium batteries) and voltage drops, it is also a way to damage nickel metal hydride. Excessive discharge can cause polarity reversal and permanently damage the battery. Some electronic devices are designed to prevent this by turning them off before the reversal occurs, but simple devices such as flashlights usually do not. Ni-MH battery So what should you do with your Ni-MH battery? After all the confusion, there are some very reliable and consistent recommendations to make the most of the battery. 1. Finally get ready to replace them. Although time and use stop working, Ni-MH batteries will not be used forever. Thank them for saving you money, recycling, and then moving on. 2. Buy a good charger. You don't have to spend a lot of money on the best charger, but make sure you have a smart charger, a charger that electronically monitors the charging process and prevents overcharging. It is not only suitable for batteries, but also consumes less power than cheap chargers, which usually rely on simple timer mechanisms. 3. Remove the battery after charging. Unnecessary time on the charger means more trickle power to keep charging so more wear and tear and wasted power. 4. Do not discharge the battery regularly, so as not to extend the battery life. Despite the contrary suggestions, full discharge can actually shorten its life. Place the Ni-MH battery in a dry place at room temperature. Excessive heat will definitely damage your batteries, causing them to lose power more quickly. 6. Consider using a low self-discharge battery model. Unlike most nickel-metal hydride batteries, which are the most famous brand of batteries, Grieg stores quickly without losing electricity. If your rechargeable battery is ready, you are unlikely to return it. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: 18650 lithium battery protection board design method