Instruction: Answer the given question using the supporting document.

Input:
Question: where can I get replacement batteries
Document: First unit received was defective, but Amazon promptly sent a replacement. Some reviews say it is hard to get the headphones on the charger unit but, knowing this, it has not been a problem. The charger unit has worked well and I have not had any problems with "dead" batteries.After some fine-tuning of the frequency controls, the reception is excellent with virtually no interference. The range is good as long as you stay in the general area of the base unit.
One of the best purchases we have made in a long time. My girlfriend can actually hear the TV now. Music sounds wonderful and they have a great sounding bass. Love listening to music or music videos now with these headphones! Other headsets will burn through traditional expensive batteries. Not with these babies. The rechargeable batteries don't require frequent replacement and last for hours between charges. For the price, you can't beat them!
This is apparently an attempt to make you order JVC replacement batteries, but they're just no-name Chineese 1.2v AA NiHm rechargables - you can buy higher capacity batteries at Wal-Mart.Use Your Own Battery Charger, and rotate out a couple of sets of freshly recharged batteries, modified as stated above - The charging stand is hard to make reliable contact, and takes too long to recharge.
Battery replacement really is a pain. I know to put the phones on the charger but sometimes it doesn't get done. Having to remove and then put back the ear pad, is not an easy task. Maybe some velcro or other way would be easier then trying to get the pad back in the groove. The other gripe is about the charger. There's got to be a better way besides the little slot. Maybe a simple plug-in would ensure a good connection each time.
I giver these a rating of 5 based on the quality for the priceOne note, it is kind of odd to have to take off the ear cover to get to the batteries. NOTE, to successfully and easily get the ear cover back on, read the directions, they make it very easy.
Bought two of these. 3 issues....  1) spontaneously clicks or buzzes in ear, 2) mounting is difficult to get to connect to recharger (not a clean connection, 3) batteries... you have to by specific rechargeable batteries, not just any rechargeables... Kind of frustrating. So NO, I do not like these at all.
in the discription of the product it says it can connecto any sound device with bluetooth which is not true it can only connect to it station. And they said in manual &#34;use only the rechargerble battles provided but there were no batteries in the packege. I have had this this for three days now i cant even get it to work. When I plug the adopter in non of the lights on the station turns on.
Takes too long to charge and has lots of noisy RF interference.Uses proprietary batteries.I find that the large buttons on the sides get pushed inadvertently (a lot).On my TV, when the plug is inserted the speakers cut out, so it has to be plugged in for each use.I find that the TV volume must be significantly increased when using the head phones.
I didn't know were to install to two ni-cad batteries. After looking at the headset for about 10 minutes, I guessed that one of the ear pieces came off and I would then find the removable panel to install the batteries. I made a guess and took the wrong earpiece off. It's the right side, the same one with the on/off switch. JVC does get an A+ for the design of the headphones. Both earpieces come off so that they can be replaced.
Its an nice headset, but there are two features that make me wish I picked a different model or brand. To install the batteries you remove the  padding on the ear piece. it comes off easily but is rather difficult to get back in place. Its not elastic you have to get the material back into a groove. It also requires special batteries 2 come with the headset. They are about the same size as AAA , but I have never seen there like in a store.
Answer: The unit calls for an AAA Ni-MH rechargeable battery, however there is a small tag within the unit that states to use JVC replacement batteries. These cost about $24 shipped for a pair. The unit WILL work with standard Ni-MH batteries with the following simple fix:Trim the plastic wrapping 1/4" off the bottom (negative side) of the battery just like the original ones are.There is an internal contact within the headphones that it makes on the battery edge and not on the end as would be expected. JVC came up with a simple method to make certain we only use their batteries.