  Let $(M^{n}, g)$ denote a Riemannian spin manifold of dimension $n$ with
Dirac operator $D$ induced from the Levi-Cevita connection acing on the spinor
bundle, $S$ ($D$ is also called the Atiyah-Singer Operator). Let $c: Cl(TM^{n})
\rightarrow End(S)$ be the standard representation of the Clifford Algebra as
endomorphisms of the spinor bundle. Let $B \in End(S)$ be a zeroth-order
endomorphism of the spinor bundle; given an in an orthonormal frame, $e_{j} \in
TM^{n}$ by the expression $B=f^{\alpha}c(e_{\alpha})$ where the sum is taken
over multi-indices, $\alpha = (i_{j_{m}}), \ m = 1, \, 2, \, 3 \, ... ,\ k$,
$j_{1}< j_{2} < ... < j_{k}$ and each $f^{\alpha} \in C^{\infty}(M^{n})$. The
purpose of this paper is investigate when the Dirac-Schrodinger operator $D +
B$ has an integrating factor, i.e. when does there exist an invertible
endomorphism $A \in End(S)$ such that $D(AB)=AD+AB$. This has applications to
improving eigenvalue estimates for Dirac-Schrodinger operators and proving
positive charged positive mass theorems where such operators appear on the
boundary. Of particular interest is the case $n = 2$, for boundary Dirac
operators of this form appear in charged positive mass theorems based on the
initial data formulation in mathematical general relativity. It allows us to
generalize a theorem of M. Herzlich (set-forth in his attempt to prove the
Riemannian Penrose-inequality using spinors, cf. [1]) to a manifold of
dimension $n \geq 3$ containing an electric field and symmetric two-tensor
representing the second-fundamental form.
