502540 3.7v Battery 550mAh for Sena SMH5 Motorcycles Bluetooth Headset Battery Replacement Sena SMH5-FM SMH5D SPH10H-FM Part Number (P/N): ICP40/25/40P fits Nextbase 312GW HD Recording DVR Cam

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.

Arrived on time, exactly as stated by seller , fits well in my Sena S20 & charges fast.. within an hour it was fully charged!

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.

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.

Worked really well. The plug was identical no need to change like some videos Ive seen.I’m now able to go for long ride without recharging. I get typical 8 to 12 hrs depending on if i play music the entire time . Old battery went about 3 hrs. The new battery is awesome,

It's in, and time will tell if it actually outlasts it's smaller original, or even match it... the procedure to change the SENA 20S was easy (YouTube vids), but the battery is also slightly physically bigger than original in a tight space. It went back together after some wrangling but that means slightly more pressure than there was originally, and a couple times, my jog wheel center button seemed to stay in the activated (down) position, but it isn't frequent and perhaps I need to go back in and adjust positioning slightly.The installed plug was exact for 20S so no soldering of original one like some other batteries.For Sena, don't forget you need a T8 driver, usually found in more extensive mini screwdriver kits.

This worked perfect for my older Sena headset. Fit and plug were correct. New Life to my older set!

Unfortunately, this review will not be about the battery life, but more about the ease of installation.I am not in a position to actually use these yet, but I had my Sena SMH10's main units with me and knew the batteries needed to be changed. My main concerns were fit of the battery and ease of opening up the headset to install the new battery.These batteries came promptly and are a larger capacity battery than the originals in the headsets.After taking out the three screws holding the headset together, I carefully pried the two pieces apart.This took under a minute to do.....from that point on, changing out the battery was simple. It plugs right in to the port that the old battery is unplugged from and fits perfectly into it's alloyed space.Within minutes, the two pieces were fit back together and screwed right.I immediately charged both units and, initially amber, they were soon blue, indictating a charge.I know they will now work, but don't have the helmets or mic attachments with me to actually use them as this equipment is in another state.At least I'll be ready to go when I finally hop onto my scooters in a few months!