What types of batteries are used for flashlights?

Most of the batteries used in independent flash units are nickel-cadmium batteries, nickel-metal hydride batteries, ordinary zinc-manganese batteries, alkaline batteries, and so on. Zinc-manganese battery: Ordinary zinc-manganese battery is also called carbon battery. Low price, low capacity, not suitable for large current and long-term continuous work occasions, alkaline batteries: alkaline zinc manganese batteries, the best performance varieties. Suitable for large discharge capacity and long-term use. The internal resistance of the battery is lower, so the current generated is larger than that of ordinary manganese batteries, and the environmentally friendly mercury contains only 0.025%, which does not need to be recycled. One of the most cost-effective batteries at present. Nickel-cadmium battery: The nickel-cadmium battery can be charged and discharged more than 500 times, which is economical and durable. Its internal resistance is small, not only has low internal resistance, it can be charged quickly, but also can supply large current to the load, and the voltage change during discharge is small, which is a very ideal DC power supply battery. The most fatal shortcoming is that if the charging and discharging process is not handled properly, there will be a serious memory effect, which greatly shortens the service life. Ni-MH battery: Ni-MH battery is a combination of hydrogen ions and metal nickel, which has 30% more power reserve than nickel-cadmium batteries, lighter than nickel-cadmium batteries, longer service life, and no pollution to the environment. The disadvantage of nickel-metal hydride batteries is that the price is much more expensive than nickel-cadmium batteries, and the performance is worse than that of lithium batteries. For nickel-metal hydride batteries that have not been used for a long time, it takes a period of activation time to recover the battery power. Lithium batteries refer to batteries containing lithium (including metallic lithium, lithium alloys, lithium ions, and lithium polymers) in the electrochemical system. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium batteries. Lithium metal batteries are usually non-rechargeable and contain metallic lithium. Lithium batteries do not contain metallic lithium and are rechargeable. Large capacity, long life, light weight, poor safety and high cost. 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 post: What types of Ni-MH batteries?