If the batteries are of the same type, i.e. both are NiMH or both are Lithium-ion, then you can use a higher capacity (i.e. higher mAh) battery instead of the lower one. The reverse is also true.
People visiting Table Rock are not allowed beyond the Mill Creek Watershed boundary, which is clearly marked with numerous signs. As mentioned earlier, the Mill Creek Watershed is a closed watershed and no public access is allowed, as it is the municipal water source for the city of Walla Walla, Washington.
The highest point of Table Mountain is 3,563 feet above sea level. It's called Maclear's Beacon for the man who built a stone cairn at the site in 1865. It was meant to be used for a trigonometric survey. The first recorded hike to the top of the mountain occurred in 1503 by a man named Antonio de Saldanha.