I purchased this toothbrush because it was cheap. I used it for 3 weeks without a problem but when it needed charging it wouldn't charge. I tried different plugs & left it plugged in overnight. But no charge. I requested a refund on Amazon & the company wrote me & sent me a new toothbrush that I received yesterday. I am very pleased that the company backs it's products because it doesn't happen too often in today's world. I will update how the toothbrush functions after I use it for awhile.