Frequently Asked Questions What is the lifetime of a blade in my Philips OneBlade? If you would like to know what is the lifetime of your Philips OneBlade, please find the answer in the following lines. What is the lifetime of a blade in my Philips OneBlade? Depending on your usage behavior, the exact lifetime of the blade could be longer or shorter. Each blade lasts up to 4 months*. *For best shaving experience. Based on 2 full shaves per week. Actual results may vary.