Greater Held Charge

 
Prerequisite(s): None
 
Benefit: You can hold a charged touch spell and still cast a spell. The charge may not be released in the same round as the new spell has been cast, but you do maintain the charge. The number of times this feat can be used while a specific spell is charged is equal to the caster’s constitution modifier. Once you have cast that many additional spells, if you cast another, the charged spell dissipates as normal. Spells cast using this feat take up a spell slot one level higher.
 
Source: Mongoose Ultimate Feats