Sennheiser BA 151 Rechargeable Battery for IR and RF Wireless Headsets

Here the product is very good. I had no problem with the batteries and they are working as expected.Don't know how long they will last for yet. I am hoping they will last longer than the cheaper oneswhich i have purchased in the past. I don't mind paying the dearer cost for these batteries as longas they last and are of superior quality to the cheaper ones.The cheaper ones I purchased previously did not fit as good as these ones do. Also one of the cheaper ones completelycame apart.These ones on inspection do appear to be of better quality. Delivery was good also.The only negetive I would have was that the cost of postage on top of the price of the batteries was too dear.I would expect cheaper postage for such small item. It was not next day delivery or anything like that.Overall though quiet happy customer.

I've recently purchased 12 batteries for the Sennheiser infrared hearing assistance devices in our church:3 Empire CPH-522 batteries on 12-30-2011: Functionally OK, but slightly thicker than the BA151 battery. I had to remove the manufacturer's label, and even then, the fit was rather tight in our Sennheiser charging units.3 Sennheiser BA151 batteries on 12-30-2011: One of the three has a shorted cell, so the output voltage is about 1.3 instead of 2.6.3 Sennheiser BA151 batteries on 3-13-2012: So far, OK3 HQRP BA151-replacement batteries on 3-13-2012: So far, OK, but a slightly tighter fit than the BA151.The Empire representative responded promptly and provided excellent support. He sent my evaluation, including vernier caliper measurements of the batteries to the manufacturor. However, he and I suspect other batteries in the inventory would have a similar problem. I elected to keep the batteries. I improved the fit somewhat by removing the label.Over the years, I've purchased about 25 of the Sennheiser BA151 batteries, and only one has not performed properly. I'll take off one star, but still, the record is quite good.Sennheiser BA151 Rechargeable NiMH Battery

I've had my Sennheiser cordless headphones (HDR 65) for several years now and they have not broken yet, not even a tear on the fabric, or a loose switch. The battery I believe is li-ion since is feels so light, almost like a empty case. With a full charge it last well past a full length movie, nice and loud, and when the battery goes dead it's simple to pull the back up battery out of the transmitter base and swap them out and keep going! Never really run out of juice. My batteries finnaly died after 6+ years of ownership, not bad!Con, when the audio is low enough you can hear radio hiss in the headphones, but that's not detectable at a deceant level of listening.

These are NOT Sennheiser brand. They work okay, but don't hold as long a charge nor last as long as the Sennheiser BA 151's. They show the Sennheiser logo, but not the word and are not in MFG packaging.

I returned this item because it didn't work in my Seenheiser headset. I confirmed that it was identical to the old battery which I was replacing because it was fading fast. After Prostudio Sound & Music received the return they accused me of switching item the I returned or damaging the item they sent. The item that I returned was the same defective item that was shipped to me. I tried it a couple of times in my Sennheiser headset and it didn't work. That could not have done the damage shown Prostudio's photo, so either it was there when it was shipped or Prostudio used a photo of a different item. Prostudio only agreed to refund $8.42 to me. They charged an 80% restocking fee of $17.56 and I had to pay return shipping of $5.25 (the shipping label they provided did not cover the cost). In total it cost me $27.20 plus the return hassle and all Prostudio would refund to me for their defective item was $8.42. In addition, the 80% restocking fee and return postage by buyer was not shown anywhere on the amazon website. Amazon did issue a $15 courtesy refund to me. However I would never order anything from the disreputable Prostudio again.

I am partially deaf and need aid to understand words on TV. I cycle a pair of these batteries for my well-used Sennheiser headphones; one in the phones and one ready in the recharge slot. They take quite a number of recharges before battery failure. This is just the second pair of replacement batteries I have needed in well over ten years of almost daily use of my headphones. These bulk packaged batteries, so far, have been just fine, and for a much less expensive price than the retail packaged ones. Be sure always to give a complete charge to a new battery before its first use.

I have a 10 Battery charger. These batteries do not fit well. The Charger is a Sennheiser.

Hello- I recently ordered two sennheiser 151 batteries. I have used for about 10 years, and only new every 4-5 years. Not always from Amazon. However, the last order I received one 151, and the other looked almost the same, but when I went o put into headphone it did not fit. The one I received needed the label removed before it fit, but the other would not go into the charger or the headphone, and on extra close inspection, they are not the same. the one is about .1mm thicker, and the contacts are a different size, and there is no 151 identifing marking on one side opposite the contact side. So when you sent the two new one's I ordered today, please make sure they are the proper 151 sennheiser rechargeable NIMH batter as shown in the picture.http://www.amazon.com/gp/product/B0009PL4CY/ref=cm_cr_rev_prod_imghttp://www.amazon.com/gp/product/B0009PL4CY/ref=cm_cr_rev_prod_imordered under ag miller 4402 sw rose st. Seatle, Wa 98136. lease send the two I ordered today for sure. A. G. Miller or Arbie G. Miller or Arbie Glenn Miller all are the same.