Juice Pack Battery Case for iPhone 15 vs Guide Waterproof Case: which is safer?
Mophie Juice Pack Battery Case for iPhone 15 is the clear pick. Sea To Summit Guide Waterproof Case carries a failing PFAS grade, and we never recommend buying a failing product.
Our pick
Mophie
Juice Pack Battery Case for iPhone 15
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleLithium-ion battery thermal runaway risk
PossibleElectromagnetic field exposure
PossibleCounterfeit or degraded battery cell defects
Sea to Summit
Guide Waterproof Case
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
Possiblewater-repellent coating volatilization and off-gassing
PossibleCoating degradation and microparticle release
PossiblePlastic laminate leaching
Where these two actually differ
- We flag Lithium-ion battery thermal runaway risk, Electromagnetic field exposure and Counterfeit or degraded battery cell defects on the Mophie and not on the Sea to Summit.
- We flag DWR coating volatilization and off-gassing, Coating degradation and microparticle release, Plastic laminate leaching and Skin sensitization from coating additives on the Sea to Summit and not on the Mophie.
- The Mophie is Lithium-ion battery, plastic housing, metal contacts where the Sea to Summit is Waterproof case with unspecified DWR coating, which is most of the difference in these two grades.
- The gap is 45 points, wide enough that this is not a close call, and the Mophie is the one to buy.
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