Technical data

168 Chapter 6
Working with Batteries
Charging Batteries
Working with Batteries
Charging Batteries
You can charge batteries internally or using the external battery charger (Option
#820). The external charger provides much faster charging time.
CAUTION Charge batteries internally or with the appropriate charger, a SMBus charger of level
II or higher.
Never use a non-SMBus charger because the battery issues commands over the
SMBus to the charger to control the charge rate and voltage.
Never use a modified or damaged charger.
Internal Charging
You can use the E7495A/B to recharge while the test set is operating or shut down.
For a fully depleted battery, charging time is approximately 4 hours if the test set is
shut down, 8 hours if the test set is operating.
If two batteries are installed, the test set fully charges Battery 1 before charging
Battery 2. During internal charging, the charge indicator blinks to indicate which
battery is being charged.
To charge a battery internally, simply attach the car adapter or AC adapter and turn
on external power.
External Charging
The external battery charger (available as part of Option 820) lets you charge two
batteries simultaneously. Each fully depleted battery takes up to 4 hours to recharge.
You have the option of charging batteries before they become fully depleted. Doing
this does not shorten battery life, but repeatedly charging a battery before it is fully
discharged will impair the accuracy of its internal charge-remaining indicator. When
the fuel gauge error is greater than 10%, the battery should be reconditioned.
External Battery Charger LED Charging Status
Green on Fully charged
Green flashing Fast charging