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This project shows you how to replace the batteries in an Oral-B Sonic Complete toothbrush. This is a great electric toothbrush, but Oral-B tells you to toss it when the internal rechargeable Ni-CD batteries die. Aside from the wastefulness of that, the toothbrush costs about $90. So, when my father's toothbrush finally died, we decided to replace the batteries anyway. This project requires soldering, and there's some risk you'll destroy your (presumably nearly dead) toothbrush when taking it apart and putting it back together.
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The key here is ordering the battery. We found ours at the NICD Lady, a Sanyo KR-600AE with solder tabs. As of 7-29-2009, you could find it on this page:
http://www.nicdladyonline.com/shop/?shop=1&cat=13
As far as I can tell, all NiCD cells are 1.2 volts, and this one appeared to be almost exactly the right size. Since the toothbrush can hold enough charge when new to go for a week without recharging, we figured that even if these didn't exactly match the capacity of the original NICD cells, they ought to work.
Because the device was designed for NICDs, you ought to replace the battery with a NICD.
Beyond that, you need a soldering iron, solder, maybe an X-acto knife, some long-nosed pliers, a hemostat (we used a paperclip instead), and some electricians' stable.
http://www.nicdladyonline.com/shop/?shop=1&cat=13
As far as I can tell, all NiCD cells are 1.2 volts, and this one appeared to be almost exactly the right size. Since the toothbrush can hold enough charge when new to go for a week without recharging, we figured that even if these didn't exactly match the capacity of the original NICD cells, they ought to work.
Because the device was designed for NICDs, you ought to replace the battery with a NICD.
Beyond that, you need a soldering iron, solder, maybe an X-acto knife, some long-nosed pliers, a hemostat (we used a paperclip instead), and some electricians' stable.
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Thanks
Thanks!
It's charging up right now. Done my bit for the environment, battled built in obsolescence, and saved a few quid in the process.
Thank you, and your dad, for the instructions.
Here is the link: cellpacksolutions.com/Search_Data_Sheet.asp
If you use a small screwdriver to pry these taps off the batteries, there will be plenty of space to solder. Use the long nose plier to flatten the taps before soldering. I got 2 Sanyo KR600AE for less than $5 with taps and welded together.
Thanks for sharing.