UltraCharge Pro 10K Power Bank vs Techsmarter 20000mAh Portable Phone Charger Power Bank: which is safer?

Belkin UltraCharge Pro 10K Power Bank is our pick: better on PFAS and on the overall hazard picture.

Our pick

Belkin

UltraCharge Pro 10K Power Bank

PFAS grade

B 85/100

Overall grade

B 81/100

Verdict

Buy

Hazard flags

⚑ 1

Material

lithium-ion battery, plastic housing, circuit board

Confidence

72%

PossibleLithium-ion thermal runaway (overcharge/short circuit)

Why this gradeBuy

Samsung

Techsmarter 20000mAh Portable Phone Charger Power Bank

PFAS grade

B 85/100

Overall grade

C 77/100

Verdict

Buy

Hazard flags

⚑ 2

Material

Lithium-ion battery, plastic housing, circuit board components

Confidence

72%

PossibleLithium-ion thermal runaway and fire risk

PossibleBattery leakage or electrolyte exposure if damaged

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 phone chargers & cables: see the full ranking