My client had a vivo smartphone with a worn out battery and we tried to look for a replacement in the country and there was no shop which had stocked vivo batteries. Importing a new one is costly and could take a lot of time from abroad. I came out with a solution to modify it for him at a cost like just buying any battery in any spares shop. So If u got same problem don't worry we got you. Subscribe, like, share and comment to support our work. Thanks