Both Philips and the similarly sturdy Oral-B. You know they are good because they have a sealed design that uses induction to charge. By contrast the toothbrush

Both Philips and the similarly sturdy Oral-B. You know they are good because they have a sealed design that uses induction to charge. By contrast the toothbrush mentioned by the OP won't last long with that flimsy door and the USB port in a wet environment.