Autel Maxivideo MV400 - Manual (Page 16)

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to start charging.
 The battery will begin charging automatically. While the
battery is charging, the charging indicator light will be red.
 When the battery is fully charged, the charging indicator
light will be green.
 Once the battery is charged, it may remain until it is ready to
be used. There is no risk of over-charging the battery. When
the battery has been fully charged, the charger automatically
switches to retention charging.
 Unplug charger from outlet once charging completes.
NOTE: New battery reaches full capacity after approximately 5
charging and discharging cycles.