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This clip, I have to apologize to all fans. I released a lot of noise, both the sound of the fan entering the microphone, the sound of the drill from the technician's work. Next time, there will be no more in the next clip. I really apologize. Someone asked me about using batteries to store solar cells for use at night. Normally, they use water batteries or acid batteries. Some people say that they can be used for a year or two before the battery swells and the nuts are damaged. They have to change the battery often. Some people say that they can only be used for a short time before they run out. They have to add more batteries or increase the size of the battery to increase the amps. Will changing to lithium batteries solve these problems? I heard that the price is quite high. Is it worth it? There are many types of lithium batteries. Lithium phosphate batteries, lithium ion batteries. Which type should be used? How many volts and amps? How to calculate? Is it safe? Will it explode? How many years can it be used? It really made me dizzy. So I went to ask Professor Kai or Kook Kai, the engineer's disaster, to explain it to me. I would understand and answer the questions of those who are wondering. As for how Professor Kai will explain, you have to listen carefully. The clip is 25 minutes long. This clip is supported by: 48v lithium battery from Lazada: https://s.lazada.co.th/s.jq7Ca?cc https://s.lazada.co.th/s.jq8eg?cc https://s.lazada.co.th/s.jq844?cc 48v lithium battery system from shopee: https://shope.ee/qEUWK46YC https://shope.ee/2pzYuAIZgz https://shope.ee/4pkdHwPzzf