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Once you get the battery back in, make sure you secure it tightly with the battery held down, and I don't mean by a bungee cord or its equivalent. Even thought the Optima can take the abuse from being knocked around, it can damage the cables, connections, or fall into the fan and really mess things up. If you need to get a new hold down, do it. It's cheap insurance. This can be a big problem in a lowered vehicle that rides a little rougher. Also, be careful to not over-tighten the connections.