Power keg

When you put 3 TNT, 3 blocks of redstone, and 3 levers on a crafting table, you can craft the Power Keg. When placed, it resembles a normal block of TNT except that it looks corroded and there are 3 unbreakable levers on it. When all 3 levers are activated, it hisses like a creeper for 10 seconds, then blows up stronger then 2 charged creepers! Already crafted Power Kegs can be found in old ruined structures, and in dungeons. It would be very useful for mining, as it destroys the blocks, but not the items the blocks drop. I think the normal TNT is too weak and Minecraft needs something stronger!