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.
Rock Creek Falls is a scenic tiered waterfall in the Unaka Mountains of Cherokee National Forest. The trailhead is located in the Rock Creek Recreation Area, just east of Erwin and the total hike is about 3 miles round trip. This area has a day use fee, payable at self-serve kiosks in the parking lot.