I challenged the whole network to transform the ugliest battery box, but not the most bullish, but the ugliest. The transformation of this battery box is not like those who can model and do 3D prints by themselves. I can only transform it with the most primitive methods. This battery case is 31, I just finished the renovation, by the way to test its functionality. I tested it with a small light, used a 14500 battery, and tested it section by section, so that I could test whether the battery box was working properly. There is no problem with this battery case, the lid can be closed. I twisted it to see if there were any gaps. The test light test, there is no gap, indicating that the battery box is working normally. The four-eye battery box is better than the 31 battery box, because the inside of the four-eye battery box is flat, and the battery contacts can be directly connected. I've changed it halfway, and the battery contacts on the bottom of the battery compartment have been connected, including the telescopic lever that connects the positive terminal. Tomorrow I will connect the copper sheet so that it can be used directly. At that time, only need to replace the battery, and it can be used normally. If you want to change the battery box of the 31, it needs to be more complicated, because it is not flat after disassembly, and it needs to be leveled with glue to install battery contacts, copper sheets and other components. The quad battery box is simple to change, but the battery life may be shorter. The battery box of the 31 is complicated to change, but the battery life will be higher. It depends on the needs of the individual. Another method is to directly weld the four batteries of the quad battery, and then connect the output and input to this battery box, so that the battery does not have to be removed separately. I've finished remodeling the battery box, in fact, I've done it before, but I haven't had time to record. The aesthetics of this battery case are not very good, and the inside is polished roughly. Here are some solder joints. Now test these solder joints. I have been testing with a lamp before because it is convenient, and I also have a mini multimeter. I wanted a mini multimeter that was easy to carry, so I kept it in my bag all the time. I use a 3-volt quad battery. I first tested the battery contacts of the battery box, more than 30 are fine, only 3.3 volts one is no problem. I tested the contacts of the battery one by one, and now only 3.3 volts one is no problem. I tested the battery contacts of the battery compartment and it was fine.
I've finished remodeling this battery case, but I'm using a 3.3 volt battery. If I had previously added a boost module to the night vision, the battery capacity of this battery case would have been enough. If I didn't add it, I would need a larger capacity battery, such as a 3.7-volt one.
