I have a battery pack that looks like it's 16 D batteries joined together with single plug. Seems to be a pack that would be used to power display merchandise in stores, such as games.
By value do you mean cash value? I have no idea. Probably not much, who wants the expense of buying 16 D cells. If you electrical value, it will depend on how the batteries are connected together. It could be anywhere from 1.5 volts up to 48 volts.
stick the terminals on your tongue