30000mAh Waterproof Solar Charger & Solar Power Bank- 18 W Wireless Phone Charger - 6 Outputs & Type-C Input & Output - vs Techsmarter 20000mAh Portable Phone Charger Power Bank: which is safer?

Where these two actually differ

• We flag Waterproof coating composition (PFAS or alternative), Plastic housing additives (flame retardants, plasticizers, UV stabilizers), Volatile organic compound (VOC) off-gassing from internal electronics and adhesives and Battery thermal runaway or electrolyte leakage if housing integrity fails on the Samsung and not on the Samsung.
• We flag Lithium-ion thermal runaway and fire risk and Battery leakage or electrolyte exposure if damaged on the Samsung and not on the Samsung.
• The Samsung is Plastic housing with unspecified waterproof coating where the Samsung is Lithium-ion battery, plastic housing, circuit board components, which is most of the difference in these two grades.
• The gap is 40 points, wide enough that this is not a close call, and the Samsung is the one to buy.
• We are less certain about the Samsung grade, at 35% confidence against 72%, because it discloses less.