AMAZFIT PACE Internal photos details for FCC ID 2AC8UA1612 made by Anhui Huami Information Technology Co.,Ltd.
The chip shown above is the DDR3L SDRAM DIMMs memory chip. It’s from SK Hynix and is the HMT451S6BFR8A. https://www.skhynix.com/products.view.do?vseq=963&cseq=75
This photo shows the 280mAh battery.
Source: A1612 AMAZFIT PACE Internal Photos A1612_Internal Photos Anhui Huami Information Technology Co.,Ltd.