Blogger "Heng vertical Xian Ping" today released the latest horizontal review video of mainstream brand button batteries.We tested 13 CR2032 button batteries from 12 common brands on the market, and the results were a bit unexpected.Specific products include Nanfu's Chuanying, Shuanglu, Huatai, Philips, Panasonic regular models, Panasonic car key special models, Flying Lion, Maxell, Jingdong Made in Tokyo, Cooltech, 555, Duracell, and Bull.
First of all, in terms of price, the single price of Shuanglu, Jingzao, 555, Philips, Cooltech, and Huatai is less than 2 yuan. The Panasonic car key special model is the most expensive, with the unit price reaching 9.2 yuan. I don’t know whether the quality can be worthy of this price.
Then the blogger used an internal resistance meter to test the open circuit voltage and internal resistance respectively. The open circuit voltage was basically around 3.2V, and the difference was not big.
But the gap is bigger in terms of internal resistance. The lower the internal resistance, the smaller the discharge loss and the greater the discharge current. In theory, the remote control distance of the car key is farther.Among them, Shuanglu, 555, and Chuanying have internal resistances of around 5 ohms, while Feishi, Coolstate, Jingzao, Huatai, and Philips all have internal resistances above 10 ohms.
The most critical capacity test link uses a constant current discharge tester dedicated to button batteries. The discharge current is set to 5 mA and the cut-off voltage is set to 2V.
In the end, the 555 ranked first with a discharge time of 32 hours and 48 minutes and a discharge capacity of 164 mAh. The most expensive Panasonic car key model only had a discharge capacity of 82.34 mAh, ranking second to last. The Bull ranked last with a discharge capacity of 81.89 mAh.
It can also be seen from this that although it is just a small button battery, the gap between different products is still very large. The difference in power can actually be doubled, and it does not mean that the more expensive the battery, the higher the power.
Finally, considering the price factor, Shuanglu has the best value for money, and the Panasonic car key special model is undoubtedly the last.