If you're talking about those big 1.5v dry cells, I stopped using them years ago. However, I prefer not to use the glow ignitors. Instead, I use a power panel that's supplied by a 12v battery. From the panel I have a wire that runs to the glow plug. The reason I prefer this is I find the adjustable output from the panel gives me better control over how bright the plug glows. Since I nearly always start my plane engines by hand, this works better for me. The extra weight of the 12V battery isn't much, I need it for the electric fuel pump that I use for my boats.

To help with the wire, put the battery behind the wing rather than in front of it. This way the wire will be heading back instead of beside the prop. I keep my flight box to my left when I start the plane and I always run the glow wire under the wing and then over the top. This keeps it clear of the prop and ensures that when I take it off the engine, from behind the plane, it won't get tangled up in anything else.