Summary of frequently asked questions about Ni-MH batteries

Frequently asked questions about nickel-metal hydride batteries Q: What is NiMH? A: Compared with other battery structural materials, nickel-metal hydride (NiMH) has many advantages. Ni-MH battery Q: What does battery memory mean? A: Old batteries and other chemical batteries have a memory effect. This is when the battery must be completely exhausted or its capacity reduced before it can be charged. The new generation of Ni-MH batteries has no memory effect and can be charged at any time during the life cycle. If you are not sure about the level or condition of the battery, please charge it. Question: What does milliampere hour mean? Answer: This is the rated power of the milliampere hour energy storage capacity. Therefore, if the battery is compared with AA, at 2000 mAh, the capacity is twice that of 1000 mAh. Question: What is the best use of Ni-MH batteries? Answer: Ni-MH batteries are the most important application areas with high energy consumption and high demand. Question: How many times can Ni-MH batteries be charged? Answer: Generally, 1700-2000mAh low-capacity rechargeable AA batteries can be charged slowly at night for 1000 times, and 2100-2400mAh rechargeable batteries can be charged slowly at night. Charge 600-800 times. The new high-capacity AA2500 mAh rechargeable battery has a greater power capacity, but it can only be charged about 500 times in night mode. Capacity improvement or fast charging will always reduce the number of cycles. There will be less than 1,000 charging cycles for every 2100 mA or more battery on the market. Q: What application is not suitable for Ni-MH batteries? A: Under any circumstances, do not use batteries or low-power devices such as smoke alarms, emergency flashlights, clocks, TV remote controls, etc. for 30 days. Q: Why do Ni-MH batteries not work in some applications, such as smoke alarms? Answer: Ni-MH batteries self-discharge about 1% every day, so if they are used in low-energy or backup equipment, the battery only needs to last about 90 days Recharge. Q: Can I use high rated mA batteries (ie 1800 mA vs. 2000 mA) in electronic devices? Yes, mA hours allows you to get longer operating time between charges. The mAh battery has a higher capacity and has no effect on electronic equipment and can only be used for a long time. Question: Why is the voltage of AA batteries and AAA batteries of 1.2 volts, and the voltage of alkaline batteries is 1.5 volts? Answer: In fact, the average voltage of alkaline batteries when discharged is about 1.2 volts. The important difference is that alkaline batteries start at 1.5 volts and gradually drop below 1.0 volts, while nickel-hydrogen batteries stay at around 1.2 volts for nearly 80% of the discharge cycle. Once the alkaline battery is discharged to 50% of its capacity, it will supply a lower voltage than the Ni-MH battery. Question: If you don’t want to use replaceable batteries, what would you do? Answer: Don’t mix batteries of different manufacturers, batteries of different capacities, and batteries of different chemical substances, such as nickel-cadmium, nickel-metal hydride, and lithium. Do not store metal hydride in the refrigerator, and do not expose it to high temperatures. Q: Will Ni-MH batteries lose capacity over time? A: Yes, it is not serious. At a charge level of 400-800, the mAh capacity of the battery will lose 10%-15%. This can be very different due to the quality of batteries and chargers and the way consumers treat batteries. Q: Do I need to charge the battery after I receive it? A: Yes, charge it before using it for the first time. However, please note that with regard to new NiMH batteries, they usually have to be cycled at least three to five times or more in order to reach peak performance and capacity. In the first few uses of Ni-MH batteries, you may find that they are quickly depleted (discharged) during use. Don't worry, this is normal until the actual internal structure of the battery. Q: Are there any different chargers? Fast, slow, microprocessor controlled, etc.? A: Yes, there are different chargers on the market. If the charger is recently designed and sold, and it is clearly stated that it is used to charge NiMH batteries, it can still work. Most new chargers use small computer chips to manage charging, and the battery can be charged at least 500 times. If not, buy a new charger. Some unsafe batteries sometimes have a short lifespan. Fast charging will also shorten battery life by at least 500 times. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.