This Battery-Free Toothbrush Kills Bacteria With Electricity
· gadgetreview.com · popularity 20/100 · 0 similar stories today
Read the original at gadgetreview.com →
Summary
Battery-free PVDF toothbrush uses piezoelectric bristles to cut plaque by 40% in a 3-month trial, with no battery required.
Found in: Gadget Review. Rating basis: single outlet; outlet tier 2 (unlisted); 1 feeds; feed position 4.