[Gremlin]

I recently sold a camera which used four AA batteries.
I found the rechargeable ones didn't last as long as normal ones but worked out cheaper.
My two Nikons have their own brand batteries plus a spare for each.
They also have a detachable grip which holds six AA's so if I discharge both main batteries I would be able to get some A A's to see me through.
I can usually get over four hundred shots from the main battery and always totally discharge them before recharging.