boAt Aavante Bar 610 Bluetooth Soundbar with 25W RMS Signature Sound, 2.0 Channel with Dual Passive Radiators, Upto 2.5 to 5 Hours Playback (in mids) & Multi Connectivity(Charcoal Black)

• Power- This powerful soundbar is equipped with 25W RMS boAt Stereo Sound that amplifies your listening experience
• 2.0 Channel- The 2.0 Channel setup elevates the audio and lets you experience surround sound from the comfiest corner of your couch
• Dual Passive Radiators- The Dual Passive Radiators produces crystal clear surround sound, which brings you an immersive sound experience with enhanced bass.
• Upto 2.5 to 5 Hours Playback (in mids) - The 2500mAh powerful battery plays music up to 5 hours on a single charge.
• Multiple Connectivity- Stream all your music wirelessly with its multiple connectivity(BT, AUX, TF Card).
• Ergonomically Portable- Its portable design, premium sound quality makes it a perfect style statement for modern homes

Note: to be on safer side, I mentioned the battery backup as low as possible, but it can give more backup than that,
And what u see on Google or What battery backup company claim, is measured in 50-60% Volume only.