In this Phillips qt4001 trimmer battery backup is not good enough. You can shave only once after full charging. And it takes huge time to complete the charge. And the length adjustable front spare is not good in terms of quality. Once it dropped down from my hand and it broke.
And the worst thinh is I did not find the spare parts on market or in Phillips official website. It takes almost 10 to 12 hours to get fully charged and only take 30 minutes to get fully uncharged. Dont buy this product.