Toothbrush Charger


Old 01-27-15, 11:10 AM
Handyone's Avatar
Forum Topic Moderator
Thread Starter
Join Date: Aug 2000
Location: U.S.
Posts: 5,451
Toothbrush Charger

This is an obvious idle time question, but I need to know.

The Sonicare rechargeable toothbrush. There are no contacts in the brush or the charger.

Is this the future of transferring power? The brush batteries are being charged with no metal contact.
Sponsored Links
Old 01-27-15, 11:47 AM
the_tow_guy's Avatar
Group Moderator
Join Date: Feb 2001
Location: SW Fla USA
Posts: 11,588
Mine is like that, too.

Everything you ever wanted to know about inductive charging:

Inductive charging - Wikipedia, the free encyclopedia
Old 01-27-15, 12:12 PM
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 18,121
I wouldn't call it the future of charging. I remember my cordless toothbrush charging like that 40 years ago. When I see part of one device stick into the other it's easier to think of a bit like a transformer. Two flat devices close to each other though... that's just magic.

Many cell phones are now touting Qi wireless charging. Unfortunately it is inefficient and generates heat which is bad for the battery it's trying to charge.

My father in law works on light rail transit. Many new systems don't want a hot third rail or ugly catenary cable overhead. The current trend uses the mother of all cordless toothbrush chargers to give the train a charge in certain zones and it runs the rest of the time on battery. They can pump so much energy into the air that it's quite dangerous if there is nothing there to receive it so much of the technical stuff relates to not energizing the charging coils unless a train is in position.
Old 01-27-15, 12:50 PM
Norm201's Avatar
Join Date: Sep 2013
Location: USA
Posts: 6,119
Very common. the-tow-guy reference is very interesting. It has good and bad points.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes