It appears that there is a "sight window" on top of the battery, what it the correct way to interpret it's appearance?
It appears that there is a "sight window" on top of the battery, what it the correct way to interpret it's appearance?
Hello that is an eye so you can tell the state of charge of the battery based on the color. If its dark green/black it usually indicates the battery needs charged. If its light yellow/clear that may indicate that the battery may have a dead cell in it and its bad.