MAHLE eX1 Manuel D'utilisation page 27

3.5.2 Updating the External Battery eX1
1. Connect the charger to the power outlet. The charger LED will display a
steady WHITE light.
2. Connect the Charger to the External Battery.
Connect the charger to the External Battery eX1 as you would connect
it for a normal charging process. The charger LED will flash continuously
in PURPLE while the update is being performed.
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