SVOLT is reaching up to 400 Wh/kg in solid-state batteries - electrive.com
BLUETTI B230 Expansion Battery | 2048Wh – Generator Shop USA
SHAPE Full Play 99 Wh mini battery - SHAPE
Amazon.com: 3.7v 1200mAh Battery Replacement for Sony WH-1000XM3 Wireless Bluetooth Headphones, fits Sony Wh1000xm4 Headset Battery Replaement Upgrade : Health & Household