ZOLL LifeVest 4000 Patient Manual page 33

3 Insert the spare battery into the charger.
 Orient the battery with its connector facing the rear of the charger.
 Push the battery in firmly.
 On the charger's screen, read the battery status. Battery should
be charging, charged, or testing.
 For details about reading the battery status on the charger, see
page 3-11.
4 Raise the antenna on the charger.
Using the LifeVest
Page 3-9