A variety of problems often arise with charging wireless TWS Bluetooth headphones. The right or left earphone does not charge, the case from the headphones does not charge, the indicators behave differently, etc. Moreover, this is a problem not only with cheap Chinese Bluetooth headphones such as i7s, i9s, i10, i11, i12, i30 and etc., but also expensive, top models. More than once I have heard that the AirPods earphone (first/second generation, or AirPods Pro) or the case itself do not charge. There are also a lot of questions about problems with charging headphones from Xiaomi (mainly Redmi AirDots and Earbuds), JBL, Samsung, Huawei, Motorola, Xiaomi QCY and others. These instructions are suitable for all separate wireless headphones.
The fact is that the TWS headphone format itself turned out to be a little complicated from the technical side. The case is charged, the headphones are charged from the case, the headphones are connected to the case using contacts, the batteries in these headphones are very compact. There are as many as three batteries in one set of headphones. And all this should work stably and correctly. Very often one of the components fails or simply stops working. And if you take apart some cheap headphones, you can see how poorly and poorly made everything is. I'm not even talking about the quality of the parts and batteries themselves.
I will divide the article into two parts: in the first, we will look at solutions related to charging headphones from the case, and in the second, with charging the case itself.
