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

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.

My replacement Sena 20s EVO battery arrived today and I enjoyed 100% success installing it.The 20s evo install instructions are "scary" but very doable.I used youtube video /watch?v=x311Sux8PpoThe sena 20s evo was NOT designed to have its battery replaced.But just because it wasn't designed to be replaced doesn't mean it can't be done.Install instructions such as the above make it possible.YES this battery is about 1/32" wider and 1/16" longer than OEM.HOWEVER it still "fits" without any heroic efforts.I varied from video in two places. a) I used a loop of duct tape to affix the battery to its case vs using the OEM 2-sided tape. I did this because a loop of tape is way thinner makes up for any extra thickness batter might have. b) I used a piece of scotch tape to pin the cable to the battery side as to keep it out of the way during top circuit board insertion.when I was done my unit turn on all the functions worked.I have only owned this unit for a few hours but I know it accepts a full charge and all the evo functions work.Time will tell how long the battery will last.My old battery was 4 yrs old and didn't last long anymore.The picture with a yellow-sided battery is OEM, the picture with the silver battery is its replacement.

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.

Direct fit and now my Sena is brand new again.Battery would die in an hour now it lasts a good amount like it did when new!I gave this 5 stars cause it did function. Now a two weeks later the battery is completely dead. Didn’t hold a charge and won’t recharge now.

This is a great little battery and it's small enough to fit in the available space on the Sena 20S. I installed my battery quickly but accidentally had one of the wires routed in the same space where the screw post is located. The pressure of closing the case broke one of the wires. So, then I had to drag out my soldering iron and resolder the wire. Advice: Don't get in a hurry and make sure the wires are free and clear when you close your Sena back up. Be aware that these wires are much more delicate than the original wires on the OEM battery.

Battery lasted with continuous mesh and music for about 5 hours,I did turn it off during rest stops from Jersey to Tennessee but was slightly let down. Friend has a newer version of 30k but his lasted about 2 hours longer I'm surprised when comparing the mAh one would think it would be comparable or surpass the discharge rate. It fits, it's functional but know it will come up a little short

Exact fit for my application

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,