MAHLE eX1 Manuel D'utilisation page 36

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MAHLE External Battery eX1 · Service
V.1.0.3 - 07/2024
Can I use a third-party charger?
No. The charger is a device that establishes digital communication with the
batteries and if you use non-MAHLE devices, you run the risk of damaging
the elements and breaching the terms of the warranty.