Sonicare
From Wikipedia, the free encyclopedia
Sonicare is an electric toothbrush manufactured by Philips.
It vibrates at hundreds of times per second, as the name implies, with the latest models at 40,000 strokes per minute. Rather than connecting to its charger with conductors, the charger includes the primary winding of the voltage-reducing transformer and the fat handle of the brush includes the secondary winding. The magnetic field is not shorted out by spilled liquids around the sink, as an electric field would be. The replaceable head also is driven magnetically. The first Sonicare toothbrush was manufactured in Mercer Island, Washington, USA in 1993.[citation needed]
[edit] Battery life
Many users complain that the batteries on several models of Sonicare toothbrushes give out after only 1-2 years of use. The warranty period is two years and units will be replaced within the warranty period. Note that units outside the warranty period may be replaced if the consumer makes a complaint. The batteries are not "user replaceable", though with considerable effort, the consumer may replace the batteries with third-party parts. The batteries themselves are Ni-Cad batteries, which tend to suffer from the memory effect. Letting the battery completely discharge and recharge will potentially extend the life of the battery, but this is not mentioned in product literature.
