  We investigate how gravity affects Q-balls by exemplifying the case of the
Affleck-Dine potential $V(\phi):=m^4 \ln (1+\frac{\phi^2}{m^2})$. Surprisingly,
stable Q-balls with arbitrarily small charge exist, no matter how weak gravity
is, contrary to the case of flat spacetime. We also show analytically that this
feature holds true for general models as long as the leading order term of the
potential is a positive mass term in its Maclaurin series.
