Others say...

"does the job"
I've used this for about 3 weeks now and haven't had any problems. Yes the USB connection is short - the solution is to buy a 10-foot USB cord for $5 (available on Amazon). That gives me more than enough slack to operate the Wii board while still attached to the Wii. I never disconnect it so it's always charged. Not a wireless solution, but it works for me.

"Do not buy this item"
This thing did not hold a charge from the first use. If you do buy one, be sure to save all the original packaging in case you get a defective product like I did and need to return it. I would give it zero stars if that were an option.

"Won't take a charge"
This worked fine for the first 3 months. Now it won't take a full charge. The Wii Fit tells us our battery is low. We can use it plugged into the Wii which is works for us but it's not right.

"Battery Pack"
we use the wii fit balance board every day. this helps not to rub out of batteries. we just love anything that has to do with the wii fit games!!!

"A waste of money"
I use my balance board 5-7 days per week, between 30-45 minutes at a time, sometimes much longer.

The original batteries that came with my Wii Fit lasted 94 days..to spend this kind of money for a battery pack that you have to plug in is not necessary in my opinion.

I leave my balance board in the same place all the time. Why would I want to be plugging it in all the time? Much more trouble than simply replacing the batteries every 3 months.

I suppose if you have a large family using it 2-3 hours per day, it might be worth it, but 4 AA batteries aren't that expensive and anyway, if you already have rechargeables and a charger, this is extraneous.

A better investment would be a regular AA battery charger.