Trapped Chest

Trapped Chests are blocks that were added in Update 0.13.0. They are similar to Chests, as they can be used for storage, but they send out a redstone pulse when opened.

Crafting

 * 1 Chest + 1 Tripwire Hook => 1 Trapped Chest

Uses
Trapped chests can be used as containers for storing items, but are mainly used as redstone components.

When opened, it generates a signal as strong as the number of players accessing the chest (maximum 15), thus can be used for traps.

Trivia

 * Trapped Chests can only power redstone while it is open.
 * It is often used to grief other players' buildings or items.
 * There's a serious bug that Trapped Chests won't Make Double Trapped Chests, or Mojang didn't add code for Double Trapped Chests at all. Possibly fixed in either Update 0.13.1 or Update 0.14.0