Nautical Slim Waterproof Case for Apple iPhone 15 vs Juice Pack Battery Case for iPhone 15: which is safer?

Mophie Juice Pack Battery Case for iPhone 15 is the clear pick. Ghostek Nautical Slim Waterproof Case for Apple iPhone 15 carries a failing PFAS grade, and we never recommend buying a failing product.

Ghostek

Nautical Slim Waterproof Case for Apple iPhone 15

PFAS grade

F 40/100

Overall grade

F 24/100

Verdict

Skip

Hazard flags

⚑ 4

Material

Polycarbonate/thermoplastic with waterproof coating (unspecified)

Confidence

35%

PossibleBPA leaching from polycarbonate

PossibleUnidentified waterproof coating composition

PossibleMicroplastics from coating degradation

Why this grade

Our pick

Mophie

Juice Pack Battery Case for iPhone 15

PFAS grade

B 85/100

Overall grade

C 73/100

Verdict

Buy

Hazard flags

⚑ 3

Material

Lithium-ion battery, plastic housing, metal contacts

Confidence

65%

PossibleLithium-ion battery thermal runaway risk

PossibleElectromagnetic field exposure

PossibleCounterfeit or degraded battery cell defects

Why this gradeBuy

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