boAt Nirvana 751 ANC Hybrid with Upto 35 to 65H Playtime in Mids ie. 50-60% Volume, ASAP Charge, Ambient Sound Mode, Immersive Sound, Worth ₹5000

Highlights:
• Awesome Sound quality, Same as the new piece, It's Working Condition is as good as new one
• Gently Used
• Perfectly Working
• Worth ₹5000
• Active Noise Cancellation - delivering up to 33dB Hybrid ANC.
• Battery Time - up to 54 hours of playtime in ANC mode and up to 65 hours in normal playback mode  in Mids i.e. 50-60% Volume.
• Driver Size - 40mm drivers, delivering you the boAt immersive experience.
• Ambient Mode- It comes equipped with Ambient Sound Mode that lets the listener stay aware of the sounds in the ambience even while the playback is on. 
• Ergonomic Design- Max out each session with raw bliss that is offered by its ergonomically crafted over-ear design and adaptive, luxurious earcups.

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.