I came to the guys to change the battery on my old Samsung. At first, they did not install the original battery, which was in the "premium" category and simultaneously replaced the damaged connector. The old battery started to swell and damaged something. As a result, the battery did not hold up as well as on the new phone. Therefore, I asked to change it to a new Samsung one with an additional fee. Everything was done very quickly and the phone was delivered to the house. The battery holds its charge perfectly. I can recommend the guys as reliable.