Me and my wife each have our own SP4 device. Both i5, one 256 other 128GB. I don't get any battery drain whatsoever (256GB) and she gets bout 15% in 24h which is crazy. I tried everything, but nothing seems to work. Both devices are over two years old.
You are looking for M.2 NVME enclosure. I think this or something similar should do the trick:
- Amazon.com: StarTech.com M.2 SATA External SSD Enclosure - USB 3.0 with UASP: Computers & Accessories
- USB 3.0 to NGFF M.2 External SSD Drive Enclosure Case Caddy Adapter Converter
How did you...