Stainless steel blades that self-sharpen as they are used to ensure consistent, long-lasting battery performance. With a micro-USB cable, you can also charge it, and the trimmer runs for up to 30 minutes. A long-lasting battery: DuraPower technology reduces friction on the blades, maintains the motor, and extends the battery life by four times. For easy cleaning, detach the head of your Philips beard trimmer and rinse it under the tap. Make sure that it is completely dry before you reapply it.