  We construct charged soliton solutions around spherical charged black holes
with no angular momentum in asymptotically flat spacetime. These solutions are
non-linear generalizations of charged scalar clouds, dubbed Q-ball hair or
Q-clouds, and they do not contradict the non-existence theorem for free
(linear) scalar clouds around charged black holes. These solutions are the
first examples of O(3) solutions for Q-clouds around a non-extremal and
non-rotating BH in the Abelian gauge theory. We show that a solution exists
with an infinitely short hair in the limit of extremal black holes. We discuss
the evolution of scalar hair in a system with fixed total charge and describe
how the existence of Q-clouds is related to the weak-gravity conjecture. The
reason that the no-hair theorem by Mayo and Bekenstein cannot be applied to the
massive scalar field is also discussed.
