I thought it was going well, so I bought several to give as gifts.

Charging works well I bought a few more Charging works well I bought a few more

Unknown cause!!!! As soon as I received the product, I charged it, so the charge was normal!! But.. fast charging is not possible. Is the auxiliary battery defective?? The first time I inquired at the seller, and the second time, I visited the Samsung service center and tested the high-speed charging from the s22 series to the s23 series displayed in the store. As I explained it to the engineer and told him to try charging it because it was the same s22 ultra, the driver's phone was fast charging. When charging with an auxiliary battery - High-speed charging is normal When charging with the high-speed charging cradle attached to the company vehicle - High-speed charging...normal charging When charging with the high-speed charging cradle in my car - High-speed charging is normal Samsung borrowed from a friend When charging with a genuine wired/wireless high-speed rechargeable battery -Fast charging normal 1. Eventually, the service center determined that there was no problem with the charging problem. Ah...How should I accept this situation... Did I have bad luck in pulling out my cellphone? It's heavy to carry and carry, so it feels like a burden!!