The duration of the buffs below are for a fully-ranked Charm. As the Charm icon does not specify which buff the player has received, the only way to determine which buff is currently active is by looking at said buff's duration.
Sets crit chance to 200%, making all attacks orange crit. Also affects some Warframe powers.
Warframe power costs are refunded on cast. (Channelled abilities only refund the initial cast, the rest of the channel is completely free.) This effect also applies to melee channel attacks.
The Orange Crit buff can force weapons which naturally cannot crit (such as the Seer) to orange crit, but since this weapon have no innate critical damage multipliers, the damage will remain the same.
The Orange Crit buff sets critical chance to 200%, and on melee, it applies beforeBlood Rush. This means that using Blood Rush will cause the 200% critical rate to be multiplied with the combo counter, creating huge crits very quickly.
The Double Pickups and Affinity buff can proc and be followed by a Rare Resource buff, doubling the amount of resources that are generated by the Smeeta Kavat.
Buffs are stackable, they do not overwrite the first buff (only the icon will be replaced with the new buff icon). 2 times or more Doubled Pickup/Affinity is possible, and the buff is multiplicative (2x>4x>8x>16x>etc.).
With Doubled Pickup/Affinity, Affinity Pickups are 4x multiplied (Because both multipiers affect them). Double affinity only applies once (think of it as the final multiplier that is applied at the very end).
The Doubled Pickups bonuses can also increase the amount of Kuva or Void Traces rewarded, but only before the player receives them.