Graco Sweet Slumber 1751642 Owner's Manual page 6

Keep the batteries out of children's reach. Any
battery may leak battery acid if mixed with a different
battery type, if inserted incorrectly (put in backwards)
or if all batteries are not replaced or recharged at the
same time. Do not mix old and new batteries. Do not
(nickel-cadmium) batteries.
Any battery may leak battery acid or explode if
battery not intended to be recharged. Never recharge
a cell of one type in a recharger made for a cell of
another type. Discard leaky batteries immediately.
Leaky batteries can cause skin burns or other
personal injury. When discarding batteries, be sure to
dispose of them in the proper manner, according to
your state and local regulations.
Remove batteries before storing product for a prolong
period of time. Batteries left in the unit may leak and
cause damage.
Recommended type batteries—alkaline disposables,
Change batteries when product ceases to operate
satisfactorily.
6