I'm not very good in explaining physics but basically most of the rechargeables deliver much less power than the regular batteries. I remember running into these problems as a kid while using my Walkman rechargeables with LEGO and with some of my toy cars So my father explained me all that stuff back then and said there is nothing one can do but buy regular batteries.

P.S. My girlfriend got a LELO out of a similar reason. It has a docking station and doesn't need replacement batteries.

I don't think it's a more/less power thing. I notice that with other toys but this is actually something in the design of the toy that makes them not work at all, rather than less effectively.

Well, I'm first of all sorry that you are experiencing any difficulty with our new Couture line. We did not design these for use with rechargeable batteries. Rechargeable units have an expanded battery compartment, as well as the proper electronics to optimize performance with rechargeables. Our units are best used with straight Alkaline batteries (we recommend Duracell Coppertop) for maximum performance. We only spec rechargeable batteries in our rechargeable units that come with all the recharging gear. You are raising an issue that bears checking out, though, and I will send some inquiries to our Engineers and ask them for the technical reasons why you are having this problem. Also, I read almost 100% of the inquiries that come through our warranty service company, link and I have not received any inquiries asking about rechargeable battery use in non-rechargeable units. Maybe the fact that most retailers "test" an item with Alkalines before it leaves the store (many just leave the batteries in place) the customer just sticks with the replaceable types. I hope this helps? The basic answer is we do not spec rechargeables in our non-rechargeable massagers...they are just not engineered that way.

Good idea! I will raise the issue at our next round-table here...if we have to add much more copy on our packaging to cover every base, you will need a suitcase to get it home ...when CEN first introduced rechargeables in 1994, we couldn't give them away, and eventually discontinued them. Nobody would buy them! See how things go full circle? We also introduced Solar Powered vibes about 5 years ago...also, a stiff! Now, we are getting calls from Redbook and other publications that are writing about "green" lifestyles asking for samples! Looks like we may have to revisit that also.

Thanks, we will look into it!

Not all rechargeable batteries are super thick. I was able to use one set of mine, but not the other set.

That is what we found also. All of our products are manufactured to specs for use of Alkaline batteries...Duracell by choice.

Great!

We are selling our products to a worldwide audience, so we have to cater to the broadest applications as possible for universal acceptance. The fact that some rechargeable batteries do fit is a good thing....unfortunately we can't spec every model battery out there, so we apologize if it's sometimes trial and error for users.

Sorry...I have passed all of the rechargeable battery questions to our Engineers. Let's see what they come up with!