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Viessmann 7450156 Backup Battery Replacement

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  • How to dismount a Viessmann 7450156
  • How to open a Viessmann 7450156
  • 1 × Spudger
  • 1 × Soldering Workstation
  • 1 × Desoldering Pump
  • 1 × Solder Wick Braid
  • 1 × Lead-Free Solder
  • 1 × 3.6V 2400mAh AA Lithium Battery, Axial Pin—The original battery uses Radial Pins, but these seem to be rather rare these days.
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