In such devices such as a Bluetooth headset, MP3 players, and the like miniature gadgets, very few capacious batteries are installed. Maximum 3-4 hours listening to music, no more. How much I repaired them and disassembled, there are batteries from 40 mA / h everywhere, and no more than 350 mA / h. This is very little. And if in your smartphone there is a powerful battery, then take a big and heavy Power Bank on the road, for the sake of recharging the player or headphones, not too profitable. Therefore, I propose to make a compact external charge of disposable evaporators used. The product that we get in the end will have a container sufficient for 3-4 charging of the headset, and 2 chargers of the MP3 player.
The device will have dimensions no more disposable lighter, which is very convenient for wearing with you.
Need
- Disposable evaporator (2pcs).
- Charging module 18650.
- Soldering iron, Tin and Flux.
- Lubes.
- Engraver with a cutting disc.
- Second glue.
- Hot glue.
- Scissors.
- Fillet.
- Insulating tape.
Manufacturing charger
First you need to pick up two evaporators with the same batteries. Preferably with the same capacity and shape. I didn't have any problems with this - knowing about my passion to, all kinds, assemblies and homemakes, I constantly bring these disposable evaporators.
Manufacturers of these devices, lithium-ion batteries, put them in disposable gadgets, are very shortned. In addition, these devices, for the most part, are sent after use in the landfill, poisoning the soil. So is it not better to give them the second "life"? So, if you yourself are not interested in so doubtful pleasure, how to smoke these things, then it is possible among your acquaintances, who have such unnecessary devices. We disassemble two identical evaporators and cut the wires of the wire from the battery.
All other insides can be thrown away. We leave the same body that you liked the color. Take the charging module, and try it to the case.
From the other side, where the battery was taken from. If the module does not fit into the housing, then we mark the place to be cut, and we cut this place.
Again, try the module to a new place.
If everything came up, you can take a battery assembly. To do this, glue the second battery adhesive. Plus to the plus, and minus to minus.
Also, in parallel, and solder them:
We are trying on how they enter the housing. If everything is in order, then you can ship to the charging module that has received a dual battery.
Each of the batteries has a capacity of 280 mA / h. Speeded batteries in parallel, the capacity doubles - 560 mA / h. So, we clean the tips of the wiring, they are loudim, and solder according to the polarity indicated on the module and batteries. Here you need to be extremely attentive; If you make a mistake with polarity, the module instantly fails. Check the resulting filling of the future charger.
The indication on the module shines in blue at the return of energy, when charging the charger itself it will shine red. Now isolating the contacts of batteries with a piece of tape, and push the whole thing into the case.
In those places where the fiberglass base of the module concerns the charger body, dripped up a drop of second glue. The remaining cracks are clogged with a gun with a thermoclaim.
I, as it usually happens, the thermocons ended at the most necessary moment. I had to improvise with the remnants ... We wait until everything frozen and get dry, and check again. You can on several gadgets.
Everything works like watch. And he himself is charged from the power supply, and gives the charge to other devices. We charge a new device, according to the indication of the LEDs on the module and, together with a short USB cable, you can remove it in some pocket of everyday outerwear. At the right moment, you will definitely remember it!