Versa 4 Smart Sports Watch vs Juice Pack Case for iPhone 17 Pro Max: which is safer?
mophie Juice Pack Case for iPhone 17 Pro Max is our pick: better on PFAS and on the overall hazard picture.
Fitbit
Versa 4 Smart Sports Watch
PFAS grade
Excellent 85/100
Overall grade
Good 73/100
Verdict
Buy
Hazard flags
⚑ 3
Material
Aluminum case, elastomer band
Confidence
35%
PossibleElastomer band degradation and microparticle shedding
PossibleBacterial or fungal growth at band-case interface
PossibleSkin sensitization from band contact allergens
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
Where these two actually differ
- We flag Elastomer band degradation and microparticle shedding, Bacterial or fungal growth at band-case interface and Skin sensitization from band contact allergens on the Fitbit and not on the Mophie.
- We flag Microplastics from case degradation on the Mophie and not on the Fitbit.
- The Fitbit is Aluminum case, elastomer band where the Mophie is Plastic housing, 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