Sennheiser BA 370 Rechargeable Battery for PX210BT, PX360BT, MM400, MM450, MM550, PXC360BT, PXC310, PXC310BT

Great for those long 14 hour flights where all there is to do is watch one movie after another. I keep two extra batteries fully charged in the zipper pocket that came in the headphone case. That way, not only do I have enough power to fly long distances, but also to move through airports etc. One thing about changing the battery is that changing the battery can be a challenge at times. The rubberized tab which is a cover for the charging port is convenient to pull the battery out. That is, until the tab becomes pulled off after trying to change the battery this way. Otherwise, it is a definite challenge to get the dead battery out of the unit in order to push in a freshly charged battery. Given this battery is the only choice for this purpose, it is a "must have."

works fine, but not easy to remove from headset

I bought this as a spare battery for my Sennheiser MM-550's. It's the exact same battery that comes with them already (and apparently works in many other models of Sennheisers). That's great not only for Sennheiser (cheaper production), but great for the customer --one battery, many models of headphones.What I like the most about this battery? Two things:1. Long life - it lasts between 8-10 hours on average for listening to music (depending on settings, volume, etc)2. You can charge it via MicroUSB without it being inside the headphones.I usually am using my headphones and, when needed, charging the second set. I use my 550's about 8-10 hours/day each day.That being said, one way to drain your battery much quicker is when you're using it as a headset (talking on the phone).

I'd used Sennheiser for years and when I decided I wanted a bluetooth headset I went with the m500x, after about a year the headband broke and sennheiser warranty service replaced the headphones and gave me an upgraded me to m550x's. Then the issue with the battery started. After owning the m550x for about 2 months the battery died. After calling it and senneheiser's warranty people replacing it no problem it lasted again about two months. Sennheiser's rep told me they replace the battery once and only once for customers, so I decided maybe I got a lemon and bought this battery off amazon. Its the same battery that came with the m550x, same one they put it at the factory. Died in 2 weeks. Amazon RMA'd it for me no problem. As of now, 33 days after receiving the replacement pair, it has broken again. It will not charge and after experiencing this for the 4th time I know it will never live again. I'm seriously considering tossing the entire headset over these battery issues. I love my m550x's, its a great headset. This is downright infuriating after all the problems I've had this battery. Beware.

not charging fully

Enormously overpriced, it is probably the worst part of the earphones (except weak noise cancelling).The opening of the battery is too narrow for the usual micro-usb cable ending. As a result you risk to broke the delicate contacts of the battery (what I did at last). And it will cost you another $50. My advice: select the cable to use for charging, and cut the head from both sides for the problemless insertion into the battery

Works great. Cannot beat a Bluetooth device with replaceable batteries. The two "ends" shown are for the curve of the different headphones that this is compatible with. Both ends are included, and easy to install. This can charge outside of the headphones.Update: I have moved this same battery from an MM 450-X to a new MM 550-X (changing the molding cap using the included spares), and it is still in rotation. I'd say it's still 80% as effective as when it was new. VERY happy with this.

The Sennheiser Bluetooth Noise Canx Headphone battery last about a year of recharges. I purchased 2 and the cost is reasonable. They hold a 7 hr Charge at Noise Canceling and bluetooth active. Highly Recommend. Remember that when you put in a new battery if the unit does not power up it's most likely a flat battery. But new battery is a lot less costly than a new pair of Headphones. Good overall value.

Mon casque s'éteignait très vite après des années de service . Il a retrouver son endurance avec sa nouvelle batterie (et son confort avec de nouvelles bonnettes) . Réparer et entretenir plutôt que jeter, c'est aussi bon pour notre planète non ?

Does exactly what it's supposed to and acts as a replacement or spare for your Sennheiser headphones.The only downside is obviously the cost which seems excessive.I gave this a 5 star as in my case I didn't really need a spare as I had just bought a new set of headphones so my purchase was simply made through choice. It is handy to simply pop the flat battery out put a full one in. Can be charged outside of headphones which is a good design.I suppose looking at some other brands when the battery goes the headphones are fit for the bin so being able to replace it is a bonus.

Ho preso questa batteria per usarla con le mie cuffie Sennheiser MM500X come batteria di scorta.Cosa posso dire? Funziona perfettamente come l'altra batteria che era conpresa con le cuffie.Finalmente adesso non rimarrò più a batterie scariche durante l'ascolto di un buon album!

Esta batería extra asegura la continuidad del uso de los auriculares en cualquier condición.La solapa de plástico flexible podría estar mejor diseñada. Es fácil tirar demasiado y extraerla de su posición, luego cuesta un poco volver a colocarla.La recomiendo

Batterie ist super und gut für den Kopfhörer MM 500 zu gebrauchen. Die 2 Adapter auch für das MM 450 sind super