Mana Potion is a consumableitem in League of Legends. Consuming a Mana Potion will restore 100 mana over 15 seconds. Mana Potions are useful early game, but lose their effectiveness from the mid-game onwards as the champion's maximum mana and skill costs will be too excessive for them to be beneficial. It is useful for all champions that utilize mana, so they can cast abilities more often.
You can use multiple Mana Potion while you have one active which will queue them up to be used after the previous completes (maximum 5 stacks).
Using a Mana Potion, as with all other activated items (with the exception of Entropy), does not interrupt channeled abilities.
In V184.108.40.206bMana Potion works by increasing the user's mana regeneration by roughly 6.7 mana/second for 15 seconds, which effectively restores 100 mana over the duration. As a consequence of this mechanic, Chalice of Harmony unique passive will stack with a Mana Potion, increasing its potency by up to 100%.