Arcane Battery

As an action, you can activate the Arcane Battery dispelling any magical effect on a creature or object as per the Dispel Magic spell at 9th level.  When the spell or magical effect is dispelled, the Arcane Battery collects the magical energy, storing up to 9 spell slots worth of arcane energy, if the magical effect dispelled was a leveled spell.  When capacity is reached, the battery can not absorb more magical energy until its current payload is released.  If you attempt to collect more energy than the battery can currently hold, nothing happens.

Magical energy in the battery can be used to embolden the damage of spells.  When the wielder of the arcane battery makes a spell attack roll and hits, they may immediately use their reaction to release energy within Arcane Battery.  The battery deals an additional 1d8 force damage per spell slot stored in the battery.  This releases all energy held within the battery.

Additionally, as an action energy stored in the battery can be imbued into a creature, restoring spell slots equal to the spell slots stored in the battery.  If the creature has less spell slots to refill than the battery currently holds, the remaining magical energy is wasted into the ether.  

Notes: the spellcasting or pact magic feature