Juice Pack Case for iPhone 17 Pro Max vs Smartwatch Withings Steel HR Sport: which is safer?
mophie Juice Pack Case for iPhone 17 Pro Max is our pick: better on PFAS and on the overall hazard picture.
Our pick
Mophie
Juice Pack Case for iPhone 17 Pro Max
PFAS grade
Excellent 85/100
Overall grade
Excellent 81/100
Verdict
Buy
Hazard flags
⚑ 1
Material
Plastic housing
Confidence
45%
PossibleMicroplastics from case degradation
Withings
Smartwatch Withings Steel HR Sport
PFAS grade
Excellent 85/100
Overall grade
Good 69/100
Verdict
Buy
Hazard flags
⚑ 4
Material
Stainless steel case, possibly water-resistant polymer gaskets
Confidence
45%
PossiblePolymer gasket leaching (phthalates, BPA)
PossibleStainless steel leaching (nickel)
PossibleBacterial growth in water-resistant seals
Where these two actually differ
- We flag Microplastics from case degradation on the Mophie and not on the Withings.
- We flag Polymer gasket leaching (phthalates, BPA), Stainless steel leaching (nickel), Bacterial growth in water-resistant seals and Silicone or rubber band additives (if interchangeable band used) on the Withings and not on the Mophie.
- The Mophie is Plastic housing where the Withings is Stainless steel case, possibly water-resistant polymer gaskets, which is most of the difference in these two grades.
- These two are level, close enough that price and fit should decide it rather than our grade.
Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
More waterproof smartphone cases: see the full ranking