What to do if my Nissan altima remote battery is dead?

socket left of steering wheel insert key fob nissan emblem , in first. dead remote battery can use mechanical key inside insert key fob , push start button. there 2 wafer battery choices available places sell batterys. remote taken apart pry 2 groves key insert end , work around fob battery easy install. + side down snaping halfs start @ narrow nissan emblem end , work half till click.

i have nissan altima 2008 start engine button . question ? if battery of remote dead , need start engine while don't have battery. emergency

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