802540 3.7v 900mAh lithium battery for Sena 10S series Sena 10S-01 ena Sena 20s series Sena 20s-01 Sena 20s evo Sena 30K series Sena 30K-01D Motorcycles Bluetooth Headset Battery Replacement Intercom

Perfect fit in Sena 20S - has the correct connector.

Perfect fit for Sena 30K

Exact fit for my application

I got 2 charges on this battery then it stopped charging.

UPDATE UPDATE UPDATE.............I have a Sena SMH 10 FM. Sena must have a dozen variations of the SMH10. My SMH 10 FM is maybe 7 or 8 years old, but recently, it would shut down after 2 or 3 hours of operation because of “low battery”. This replacement battery looked like an excellent choice due to a one to one replacement. However, upon receipt, the plugs did not match. The replacement battery plug was different, slightly smaller.So I looked at Utube videos on how to solder a new battery to the original plug. Looked like a piece of cake. Except that I had no soldering experience, plus no soldering iron, wire stripper, flux, heat shrink tubing, or solder. I invested in all this electronic equipment that I will probably never use again and, I quickly found out that soldering is a learned skill, and not as easy as the videos portrayed for a first timer.With much frustration, I bungled my way through the soldering the replacement battery to the original equipment plug. I then discovered that the replacement battery was thicker than the original battery!!!! I learned some new curse words in trying to reassemble the unit after I installed the new battery. SON OF A BITCH!!!!!. The two parts did not want to snap together due to a thicker battery!!!! After a half hour or so, and a Herculean struggle, I got the two parts back together.So, 5 stars for having a new battery for a longer operating life, (I hope), and 1 star for the convenience of replacement. YMMV.NEWS FLASH!! It turns out, my Sena unit is a SPH10H, and not a SMH10S.It sure looks like a 10S. but it isn't. I would have thought Sena would standardize the batteries and plugs for the entire 10 line, but not so. so I'm changing my rating to a 5, cause I didn't read the description close enough, and now have it finally installed, all is well,

I have the SMH10-11 dual version and these batteries were a direct replacement. I did verify polarity and it was correct. We’ve had these for 9 years and hopefully for another 9 years now.

This battery is a drop in replacement for the original battery which came on the Sena 20SBonus is that it is 900mah vs the 650 mah OEM battery.

Was a little bigger than OEM, but fit fine. It does last longer than the OEM and it was easy to take the communicator a part and install.