[telebarryg]

Hi Christian:

I agree with Accessible Japan; Please send in a picture of the label on your charger and they or I can give a better answer.

The short answer is:

• If you have an old charger that is big and heavy it probably has a transformer in it. It will be designed for 120 volts and at the 100 volts used in Japan it will not provide a high enough output voltage to fully charge your batteries. Lead acid batteries are, simply speaking, voltage controlled.
• If you  have a newer charger that is more like the black brick that powers your laptop  it may be designed for 100/120 volts 50/60 cycles and will do just fine in Japan. You still will need a three to two prong adapter if your charger has three prongs. These are available in Canada at Canadian Tire or Rona etc.

If you send in that picture of the sticker I can confirm the above, or your chair dealer can.

Hope this helps!