In Figure 9 we see a pair of 12-volt batteries connected in parallel. This 12-volt battery pack is connected to a single 12-volt charger. Note the blue wire designated W1. The purpose of this wire is to balance the voltage drop evenly across both batteries and each wire during charging.
Confidence votes 36. The Erie Canal was so important to the United States (U.S) because it was the water way connecting the Hudson River with Lake Erie through New York State. 20 people found this useful.
Erie is the Commonwealth of Pennsylvania's primary access point to Lake Erie, the Great Lakes, and the Saint Lawrence Seaway. The city emerged as a maritime center after the American Revolution, then as a railroad hub during the great American westward expansion.