Bottom line is keep soldering irons / spot welders or other 'heat sources' away from these batteries as they may explode.
You can also pair the headset with two different phones and answer calls from either one.
They are generally NOT meant to be disassembled.
See the rest of our site for captain wafer crackers calories lots of Cool, Vintage Electronics, Stereo / Audio Gear, Guitars, Old Microphones, Deco / Retro furniture, Lava Lamps, etc!, attention: We recommend you DO NOT disassemble or attempt TO repair OR replace THE battery on your, bluetooth headset!Other Features and Conclusions, if you have an iPhone, the M55 features a battery life indicator next to the iPhone's battery icon.And its subsidiaries, BlueAnt, Bluetooth / Bluetooth SIG, Inc, Jabra, Jawbone, Motorola Motorokr, Plantronics Inc, Explorer Voyager and all related marks and logos are trademarks of their respective companies / owners and have no affiliation with Oak Tree Enterprises, LLC.There aren't really any serviceable parts inside and changing the battery on your Bluetooth headset isn't really possible.No, we don't repair them, nor at this time know of anyone who does.Benchmarks, continuous talk time: 8 hours 28 minutes, more Bluetooth Headset Reviews: VXi BlueParrott S450-XT, plantronics Voyager Focus UC Sony Xperia Ear Jabra Halo Smart Plantronics Voyager 5200 more PCMag may earn affiliate commissions from the shopping links included on this page.Whispered alerts update you on talk time, and even announce the names of incoming callers so you can simply say Answer or Ignore to calls without lifting a finger.Tap the button and you'll hear a beep; hold the button down and wait for the next beep to initiate voice control.Fitting the M55 is simple.Models such as BlueAnt Z9i, Jabra BT-, Jawbone, Motorola 520 etc.Purveyors of Electronic, Musical and Vintage goods from then, now and in between.How do I change the batteries in my Bluetooth headset?The headset comes with just one clear eartip, along with an optional clear plastic hook.Disassembly Photo Essays of our 'attempts' to replace the batteries.The M155 is equally svelte and sleek, with better A2DP sound, but poor noise cancellation means you can't really use it outdoors.Also disassembly is usually 'messy' in that you will likely mar, chip, break or otherwise destroy the headset / housing.Surround yourself with Silver and find it again!Copyright information, please be patient while page loads.Streaming A2DP content sounds surprisingly clear, though there's practically no bass response at all.We typically refer to Batteries Plus stores to source / build / re-build batteries, but even before we embarked on this project, they informed us that most of Bluetooth headsets use a 'gel pack' /.75Volt,.54Wh, Lithium Ion Polymer / LI-Polymer / 'LIP' type.
This worked well in testing, and Plantronics claims the headset can last for up to 150 days in DeepSleep.