Phone is restarting every few minutes

Hi all. I’ve gained a broken iPhone 15 and just in the process of getting it working. I’ve just changed the back of the phone with a different one due to the cable for the wireless charging and torch was snapped. Still having the restarting issue if anyone could help. I’ll attach the error log below. Thanks

bug_type":"210","timestamp":"2025-10-21 10:47:32.00 -0700","os_version":"iPhone OS 18.6.2 (22G100)","roots_installed":0,"incident_id":"7073D81B-7734-4A49-BB2B-027565FB1784"}

{

  "build" : "iPhone OS 18.6.2 (22G100)",

  "product" : "iPhone15,4",

  "socId" : "8120",

  "socRevision" : "11",

  "incident" : "7073D81B-7734-4A49-BB2B-027565FB1784",

  "crashReporterKey" : "7a4d04608113e4aca433339283eb243d54c53af9",

  "kernel" : "Darwin Kernel Version 24.6.0: Tue Jul 15 21:53:53 PDT 2025; root:xnu-11417.140.69~16\/RELEASE_ARM64_T8120",

  "date" : "2025-10-21 10:47:32.25 -0700",

  "panicString" : "panic(cpu 0 caller 0xfffffff045af4b1c): SMC PANIC - ASSERT: target\/d37\/target.cpp:258: 0, SMC BSC failure, spreadsheet ver(*10) 40\nS.sensor array 0 - 4 is 0x0, 0x300000, 0x0, 0x0, 0x0 \nF.sensor array 0 is 0x0\n\n - Misc(2) OUTBOX1 not ready\nASSERT: target\/d37\/target.cpp:258: 0, SMC BSC failure, spreadsheet ver(*10) 40\nS.sensor array 0 - 4 is 0x0, 0x300000, 0x0, 0x0, 0x0 \nF.sensor array 0 is 0x0\n\n\nRTKit: RTKit-2784.140.9.release - Client: AppleSMCFirmware_H15-5204.140.29.d37.REL\n!UUID: 442c9086-d9d4-3b54-915f-a6d6ad6abbed\nASLR slide: 0x0000000000000000\nTime: 0x0000000216ac087a\n\nFaulting task   2 Call Stack: 0x000000000004f1a4 0x000000000004eb5c 0x000000000004e978 0x000000000004d354 0x000000000003b6b8 0x0000000000042e04 0x000000000004ad10\n\nChinook ASC Async error info: \nl2c_err_sts 0x5000fbfc00000000, l2c_err_adr 000000000000000000, l2c_err_inf 000000000000000000\nlsu_err_sts 000000000000000000, fed_err_sts 000000000000000000, mmu_err_sts 000000000000000000\ndpc_err_sts 000000000000000000\n\nMailbox (0): (0)\n  Inbox  AKF_KIC_INBOX_CTRL = 0x00020001, AKF_KIC_MAILBOX_SET = 0x11111101\n  Outbox AKF_AP_OUTBOX_CTRL = 0x00020001,