Graco SnugGlider Owner's Manual page 15

For Safe Battery Use
Any battery may leak battery acid if mixed with a different battery
Any battery may leak battery acid or explode if disposed of in fire
or an attempt is made to charge a battery not intended to be
for a cell of another type.
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.
month or more. Batteries left in the unit may leak and cause damage.
product ceases to operate satisfactorily.
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