The method is as follows:
First, prepare the mobile phone, the original battery and the battery to be modified. First use a multimeter to check the voltage of the battery to be changed. is greater than 3.7V, it can be used and note the polarity of the battery, then look at the polarity of the original mobile phone battery and note or mark the positive and negative poles of the mobile phone. three contacts on the cell phone and the battery. As long as the positive and negative poles are measured, the negative pole, do not worry about others. Usually the two poles are the positive and negative poles. individual poles in the middle or one of the positive and negative poles. As long as you measure it right, you're fine. Then observe the polarity of the two batteries. It would be best if they matched exactly. Sure, but most don't match.
Second, if the positive and negative poles are consistentts, put the battery into the cell phone battery box, called battery box. Align the contacts between the phone and the battery, then see if it can be turned on. If it's normal, the relationship is good. After turning off the phone, align the phone battery and the phone contacts, and note or mark the location of the battery on the phone. Don't worry if the battery is right in the center of the phone's battery case. You can melt the glue. Paste it and fill it. Do not forget. Once the battery is in place, remove the battery and stick tape to the back of the battery. This position must be well fixed because the melted glue stick must be hit on the tape and fill it. become one with the battery after drying, so the width of the adhesive tape should be wider than the width of the cell phone battery box so that the glue does not enter the boxier cell phone battery when applying glue. the modified battery is too small, put tape on all sides. The tape should be larger than the surface of the battery box.
Third, if the positive and negative poles do not match, match the contacts
(1) First fix the battery with the soldering station clamps, it does not There is no bracket clamps You can use other things to fix it, then use a knife to scrape off the oxide layer on the battery contacts, then apply a layer of solder paste and solder. Pay attention to the shortest soldering time, otherwise overheating will cause. battery damage The battery is not good and it is easy to solder the battery contacts, so it is in standby mode.
(2) Then take the wire and use a fine enameled wire, preferably the wire in the secondary coil of the small transformereur is relatively thicker or the wire in the earphone OK, cut a suitable section, neither too long nor too short. The goal is to let the wires that are not in place pass through the contacts made by yourself. For a specific battery analysis, you can cut two or three sections. You can direct these three contacts to the corresponding positions. If you fear problems, you can direct the positive and negative poles. As the wire is enameled wire, the insulating paint must be scraped off. Comb both ends of the wire. Don't scratch it. If the copper wire is too long, it is inevitable that the positive and negative poles will touch and short circuit in the future. dip the scraped copper wire into solder paste and coat it with solder, and wait.
(3) Start creating new contacts for the battery. Use 0.25 square copper wire. Remove a section of the copper wire and crush ita flat with a hammer, then use a grinder. polish it smoothly. The shape of the long strip is then cut into sections based on the thickness of the battery. The length of one section is three times the thickness of the battery, because the contacts need to be basically fixed on the mobile phone. The battery contacts need to be broken into a π shape so that they can be stuck on the battery. If they cannot be jammed, they can be tightened appropriately. The width of the break should be based on the thickness of the battery. breaking one, break two. Next, apply solder paste and put solder on the outside of one of the two vertical sections of π in order to solder the wires. Okay, when you're ready, solder these three pieces together. First solder the wire and the homemade contact. At this point you can use tweezers to maintain contact, use hand tweezershold the wire and solder it in contact, and. then solder the wire to the contact. Solder the other end to the battery contact so that the newly made contacts are there. Be careful not to let the contacts touch each other. Then place the battery into the cell phone battery case with one side against the edge. of the battery case. This way, when applying the glue, you can only hit the other side. Next, adjust the position of the newly created contact so that it can be aligned with the phone contact position. After alignment, use strong glue to stick it. contact on the battery, then check if the contact is just the right contact with the phone. In order to use it normally, try turning it on and see if it can be used normally. If it works, that. would be the best. Wait for the glue to dry before applying the glue.
Connect the gun toglue and let it heat for a while to melt the glue more completely. Place the battery with the adhesive tape on it into the cell phone battery case, align it with the contacts, then quickly. apply the glue. Press it into the battery case, apply glue to both sides first, then push the battery firmly against the contacts, then apply glue to the bottom, quickly cover the glue and battery with tape wide adhesive and press it. with a relatively flat board. If it's too slow, the glue may dry out. Of course you can support it with your hands. After drying, you can remove the battery. since the battery is printed using the battery case mold. This way a battery will be printed. Once that's done, if you see that there's still an area that's not very flat, you can put it back in and use the housing head. c gunuse it to melt it then press it. You don't need to tear off the outer layer of the tape when it melts. You can just use the head of the glue gun to go back and forth. The broom melts, but the glue. the tip of the gun will not melt the tape. Sometimes the four corners of the battery don't look very good when printed and can curl. It's best to use the glue gun head to melt the glue at the corners, then push the glue gun head inward to apply it. stick, then apply the tape and press hard. If there are any edges, you can use this method to trim them if you are still not happy with them. Then you can put whatever stickers you like, and a battery is ready! You can also stick a piece of narrow tape to the bottom. In this way, when you use the universal charger to unpluger the battery, it will not be difficult to remove it. You can remove the battery by removing the adhesive tape.
This layer of black material is a PE self-adhesive protective film. Its scientific name is: polyethylene plastic. It is widely used in packaging materials. It has the following two functions when attached to the battery. :
1. Indicate various technical parameters: printed battery model, type, rated voltage, capacity, implementation standards, manufacturer, production date, various warnings (Remind users and maintenance personnel to facilitate other subsequent and appropriate maintenance. disposal ).
2. Protect the battery. Most of the current non-removable lithium batteries in mobile phones use aluminum-plastic packaged soft batteries. E film can improve insulation and avoid scratches and punctures of plastic film, which forcould endanger the battery.