In MAX17055, Timer register resolution is 175.8ms, that is when it reads 0xFFFF , 3.2Hrs time is elapsed. Whenever Timer register reaches 0xFFFF, TimerH register will increment by 1. Effectively TimerH resolution becomes 3.2hrs. So the range of both the registers together becomes 23.94yrs.
At any given point of time if both registers are read then the time elapsed is calculated as,
Time = (TimerH(decimal) * 3.2hrs) + (Timer(decimal) * 175.8ms).