[. . . ] 1 Close supervision is necessary when this razor is used by, on, or near children or invalids. 2 Use this razor for its intended household use as described in this manual. Do not use attachments not recommended by Philips Electronics North America Corporation. [. . . ] Battery performance is best if you recharge only when the batteries are (almost) completely empty. Charging or recharging at temperatures below 40ºF or higher than 95ºF adversely affects lifetime of batteries. Quick Charge When batteries are totally depleted, recharging the razor for approximately 6 minutes gives enough energy for a 3 minute cordless shave. Use this razor for its intended household use as described in this manual. Shave against the direction of beard growth using both straight and circular movements. 2 Stretch your skin with your free hand so blades can lift and cut whiskers. Gently press razor to skin, so the floating heads can follow the contours of your face. It is a fact that your skin and beard need time to adjust to a new shaving system. Use your new razor exclusively for 3 weeks to fully enjoy the closeness of a Norelco shave. At first you may not get as close a shave as you expect, or your face may even become slightly irritated. Invest 3 weeks and you'll soon experience the full joy of your new razor. If you alternate shaving methods during the adjustment period, it may make it more difficult to adapt to the Norelco shaving system. If you are still not convinced after 21 days, Norelco will refund you the full purchase price, guaranteed. 4 Put the protective razor head cap on the razor to protect razor heads. Replace Quadra razor heads (model # HQ6) once a year for optimal shaving results. 3 Hold Trimmer as shown and move in downward strokes with gentle pressure. [. . . ] FULL TWO YEAR WARRANTY Philips Electronics North America Corporation warrants each new Norelco Product, Model 7866XL, 7865XL, 7864XL (except cutters and combs) against defects in materials or workmanship for a period of two years from the date of purchase, and agrees to repair or replace any defective product without charge. IMPORTANT: This warranty does not cover damage resulting from accident, misuse or abuse, lack of reasonable care, the affixing of any attachment not provided with the product or loss of parts or subjecting the product to any but the specified voltage. In order to obtain warranty service, simply take or ship the product postage prepaid to the nearest Authorized Norelco Service Location. [. . . ]