Sennheiser has just revealed the latest version of its flagship in-ear headphones, the Momentum 5 True Wireless earbuds. Taking the fight to the best wireless headphones from Bose, Sony and even Apple's all-conquering AirPods, the Momentum 5 have a notable sustainability feature that immediately caught my eye.Alongside the audio upgrades (these buds feature Sennheiser's signature 7mm TrueResponse dynamic drivers) is a user-replaceable battery system in both the earbuds and the charging case. At a time when repairability is sorely needed, it's great to see a flagship product launch with the ability to swap the batteries "using only a compact screwdriver."Lilika Beck, President of Sennheiser Consumer Hearing, said: “Balancing compact size, our signature high-fidelity acoustics, and a replaceable battery is a major breakthrough.“With Momentum True Wireless 5, we are proving that cutting-edge performance does not have to sacrifice longevity.”Enabling the user to swap out batteries is a huge step in the right direction and it's something I'd like to see other manufacturers implement wherever possible.Enabling the user to swap out batteries is a huge step in the right direction and it's something I'd like to see other manufacturers implement wherever possible.When it comes to the audio stuff, I'm not concerned. We gave the Sennheiser Momentum True Wireless 4 a 4.5 star review a couple of years ago and I expect things will have improved since then. The new earbuds come packing Bluetooth 6.0 with aptX Adaptive codec, meaning you'll get hi-res wireless audio up to 24-bit/96 kHz, provided your streaming service supports it.Battery life claims