UE Boom 3 vs UE Megaboom 3 In contrast to one man who had his on full blast for tailgating and it cut off after three hours, I've had mine on full blast for four hours and still had 20% charge left when working in my garden one day. I've also used my Megaboom 3 for over 6 hours at lower levels and still had plenty of energy left over. Maybe it's a combination of luck and how well your battery was constructed, as well as how and when you recharge it??? This is only true if both speakers are mono and the signal created by the source conveys that picture to both speakers, resulting in a'real' stereo image. Otherwise, you'll only hear stereo from one or two speakers, none of which are mono. They blended some instruments panned to one side (mono) and then to the other side (stereo), extending the sound stage like an old record from the 1960s and 1970s. It may appear more complicated than it is, but unless you have a MONO speaker, you will not obtain a (stereo) sound from two speakers, but rather two stereo speakers linked together.Yes, the UE Boom 3 has a somewhat richer and cleaner sound, especially when used with the Boom app's EQ. But if you want to wait till the UE Boom 3 is out, you can. The UE Boom 3 is somewhat larger and can be charged via the Power-Up charging port, which is sold separately. It also floats in water. The bluetooth connection is, in my opinion, the device's weak point. It sounds excellent for its size and price, but the connection on the one I bought can be difficult.Megaboom 3 is water-resistant and intended to continue booming even when wet. It can be submerged in water for up to 30 minutes and has IP67 water and dust resistance certification. It can also float. Megaboom's 360° sound is incredibly loud, clear, and immersive, with tangible deep, booming bass. Everything has been fine-tuned to ensure that you can hear every tone. MEGABOOM 3 is constructed of a two-tone fabric that is both robust and appealing. This is great if you want something to make your mouth swim. It's designed for high performance and comes in two colours. The battery life of the Megaboom 3 is quite lengthy, lasting 20 hours. Because of the latest cell technology, it will last nearly a full day on a single charge. Charge MEGABOOM 3 wirelessly with the POWER UP charging station (sold separately) so you can take it on your next sonic adventure completely charged. Megaboom 3 is built to last and is ready for action. We put it through rigorous testing to ensure that it could endure repeated button pushes, tumbles, and drops, among other things. PARTY UP/SHORT: Use PartyUp on the Ultimate Ears app to pair 2, 3, 4,... and over 150 speakers for the ultimate sound experience. Any BOOM and MEGABOOM generation can be mixed. The Ultimate Ear Boo 3 is extremely portable, waterproof, and almost entirely customizable. The Ultimate Ears BOOM 3 floats and is entirely waterproof. BOOM 3 was designed to be wet, and it has an IP67 water and dustproof certification, which means it can be fully submerged in water for 30 minutes at a depth of one metre. No matter how wild things become, your music will always be on spot. Ultimate Sound: A Bluetooth speaker that produces 360-degree bold, immersive, crystal-clear sound and has a battery life of up to 15 hours on a single charge. It brings your music to life regardless of where you are. The Magic Buttons have been replaced with brand new ones. You may play, stop, skip, and control any streaming music directly on the Bluetooth speaker with a single button click. You can make one-of-a-kind one-touch playlists for Spotify for Android*, Music Unlimited, Prime Music, Apple Music, and Deezer Premium with a single click. BOOM 3 is covered in a shimmering two-tone fabric that is strong, stylish, and designed for tough applications such as motorcycle jackets and fire equipment, meaning that this performance textile is meant to survive the weather.