Fixing my WH-1000XM3 battery convinced me of the right to repair
Researchers in China report 711.3 Wh/kg Li-ion battery cell - Green Car Congress
Amazon.com: Sony WH-1000XM4 Wireless Bluetooth Noise Canceling Over-Ear Headphones (Black) Bundle with 10000mAh Ultra-Portable LED Display Wireless Quick Charge Battery Bank (2 Items) : Electronics
Watson Pro Mini V-Mount Battery (144 Wh) VM-144-MN B&H Photo
Battery Replacement on Sony Headphones WH-CH700N (How to DIY) - YouTube
1-2pcs New 3.7V Full 300mAh Replacement Battery For Sony WH-CH500 ,WH-CH510 ,WF-H800 ,WF-XB700 Headset Charging Box 2-wire+tools - AliExpress
Battery Capacity: Watt-hour (Wh), Ampere-hour (Ah), mAh - Energy Clime
Dell 6-cell 86 Wh Lithium Ion Replacement Battery for Select Laptops | Dell USA
Sony WH-1000MX4 WH-1000xM3 Replacement Battery: BatteryClerk.com Headphone
Dell 4-cell 68 Wh Lithium Ion Replacement Battery for Select Laptops | Dell USA