@zulqarnain89925 there are two thing that you want to check. Just because your phone says it has charged the battery 100% does not mean that it really is. The battery has a board on it that controls rate of charge etc and this may have failed. For that reason you want to try a new battery. Next part to replace after that is the charging board. Your CAMON uses a small charging board to distribute the USB power tec to the main board. You'd be looking for something like this Do not forget to check the flex cable that connects the charging board to the main board.
iFixit does not yet have guides for this phone but check videos like this one to assist you further.
While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has the same problem as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.
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@zulqarnain89925 we would love to help you out but you are not telling us what model your Tecno is nor are you telling us what you have checked.
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@oldturkey03 tecno cammon 17
crwdns2934271:0crwdnd2934271:0 ZULQARNAIN IMRAN MALIK crwdne2934271:0