Battery health 85%, cycles count 334
iPhone 6S, bought on November 2017.
My battery health is at 85% so I went to the apple service centre and they ran some diagnostics and the diagnostics report said that my battery is good and only 334 cycles have been done. The person advised me that there is no need to change the battery right now and the battery will last me easily for 1-1.5 years. He said that the cycle count can go up to 1000 easily without you getting any battery issue. He also said a weird fact that battery replacement can be done on iPhones once (which he said to do near 1-1.5 years later if I want to keep using it for another 2 years, which I completely intend to do)
So I want you guys advice me whether to get it replaced now based on my battery health or keep using it based on my cycles count