SECTION 10 BATTERY MANAGEMENT PAGE 169
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What to Do if You Get a Low Battery Alert
DRS recommends you do one of the following immediately should you get a low battery alert:
• Connect external power and begin recharging the batteries
• Replace one or both of the batteries with a fully charged battery.
• Save your work and perform a normal system shutdown.
Avoiding Overly-Discharging Your Batteries
The following suggestions will help avoid an overly-discharged condition.
• Do not store the X7 for long periods with the batteries installed. Even when the unit is
powered off, the tablet still draws a small amount of power from the batteries.
• Do not store X7 batteries in a fully depleted condition for long periods of time. The X7
batteries will further self-discharge over time at a rate of about 10% a month or 3% every
10 days. The batteries should be recharged to 40% of full charge every 3-4 months of
storage.
What to Do for Overly-Discharged Batteries
The Armor Tablet X7 has an internal Level 2 smart battery charger. One of the features of this
charger is that it will attempt to recover a battery that has been too deeply discharged (3% or
less). This is done by applying a trickle current of 80 milliamps for about 3 minutes. This process
normally injects enough energy into the battery to allow normal re-charging to occur. If the
recovery process is successful, the 20% LED will begin flashing or be on steady. Allow the
battery to charge normally.
If this recovery process does not work (20% LED will not light), perform the procedure in Table
33.
Table 32. Recover an Overly-discharged Battery.
STEP ACTION
1.
Remove both batteries.
Wait 5 seconds.
Reinstall both batteries.
Repeat steps 1-4 up to a maximum of five times.
If the batteries still fail to start re-charging, they will have to be replaced.
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