Was replacing some batteries in flashlights and was sorting thru my stash to use the oldest ones first. Noticed several batteries, red duracell AA's, had leaked in the 36 pack. Also found a 18 pack of energizer AA's with 2 leaking batteries. This caused me to look at all the batteries I have on hand. So far just these incidents. These packs are less than 1 year old. Has anyone else seen this? I have not had any issues with any lithium batteries.