Battery part numbers starting with 1ICP, 2ICP, 3ICR, 4ICR, etc. Why are these used?

Usually search for battery part numbers starting with 1ICP, 2ICP, 3ICR, 4ICR to find new batteries that are compatible with the original specifications. These part numbers are the numbers used by the manufacturer (from China) for the convenience of sorting. Every lithium-ion rechargeable battery used in notebooks, tablets, mobile phones, smartwatches, Bluetooth speakers, and other devices usually has a corresponding number. And these are also a way for many users to find that the original battery model label is missing.
The battery part numbers provided by battery.org.uk are to cater to more users to find the battery they want more directly and conveniently by searching for these part numbers.