7th battery + tin foil
According to Battery.com.cn, at present, tin foil and battery can be used not only for "fire tools" (although it is true, but dangerous!). Recently, a small life skill that "the 7th battery can be used as the 5th battery" has also been circulated on the Internet. "If your No. 5 battery runs out and you have only a short 7-cell battery, what should you do? Then put a tin foil on it, and the battery size is not a problem."
"Because the tin foil is conductive, as long as the tin foil is on the positive pad of the battery, the 7th battery can also be used normally as the 5th battery." Recently, the netizen "new daily skills" has exposed a small life skill on Weibo. That is, the gap between the No. 7 battery and the spring piece is filled with tin foil, and the current is transmitted to the electronic product through the circuit.
As soon as this skill was issued, it immediately attracted netizens to watch and forward. Weibo’s netizen named “I am not Sun Hongliang†said, “It’s very practical! I tried it according to this method, it’s very effective, it’s really feasible, but it’s tin foil. A little hard to buy." However, while admiring, many netizens raised doubts. The netizen "_ with _" said, "Can different types of batteries be replaced?"
In response, the reporter contacted Wang Tao, an associate professor at the School of Physics, Chongqing University. He said that this can be used as a contingency plan, but it is not recommended for people to use this method for a long time. "Because the voltage of the 7th battery and the 5th battery are the same and the discharge principle is similar, it can be replaced under the conductive action of the tin foil." Wang Tao said, but due to the uneven thickness and surface integrity of the tin foil, the electrical power cannot be guaranteed. The stability of the parameters, after a long time, the battery will consume more power, and may cause damage to sophisticated electronic products. As for the question raised by netizens, "Which tin foil will burn up", Wang Tao believes that the heat generated by the passage of current is not enough to reach the ignition point of tin foil, but care should be taken during use.
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