firstly, the software/hardware versions supported by jailbreak are different. Chimera is unknown, uncver is now iOS11.-13.3 (except 12.3.x)/A7-A13, and chenckra1n is any version above iOS7 /A7-A11. The reason is because the vulnerabilities they use are different. chenckra1n uses vulnerabilities in programs written on hardware, so Apple can't fix them, and naturally it can't be used in new hardware. Uncver uses software (operating system) vulnerabilities. This discovery takes time and labor, so it may not be possible to release a signed version of jailbreak.

the second is that the jailbreak method is different. Uncver uses a self-signed (or corporate signature) IPA to escape from prison, and chenckra1n needs to connect to a computer. It can only be said that each has its own advantages and disadvantages. At the beginning of this year, Apple banned the signature of all developers' accounts of unreal Mac systems, resulting in the disappearance of the ReProvision self-signing tool, and the enterprise signature may be revoked at any time, which can be said to be far less convenient than before. Chenckra1n is basically equivalent to the previous imperfect jailbreak, but the restart will not only make the white apple lose its environment. However, on the whole, because there are still many enterprise signatures on the network, uncver is more flexible even if Cydia Impactor and self-signature can't be used.

the third is the jailbreak shop, which is mainly different from chimera. I still recommend Cydia. Seilo, I haven't used it, so it's hard to say.

as for power consumption, I always think that the system accounts for the vast majority, and some plug-ins will also have an impact, but the jailbreak method only uses vulnerabilities to let the kernel execute jailbreak code, which should have little impact on power consumption.

I've never had the problem of automatic logout when I use uncver. Automatic logout is often in safe mode. You should check whether the plug-in you installed is running abnormally. Chenckra1n's current Windows version is to write a Mac version of U disk PE, which is said to be quite convenient.

now uncver can be compatible with chenkra1n, but it is not known whether chenkra1n is compatible with uncver. If you are using uncver now, it is recommended to continue using it unless you want to upgrade to iOS13.3.1. If you accidentally restart outside and the verification of uncver has been revoked, you can go online to find a website where uncver is installed online (Google can find more) and download it. It is recommended to find more websites for standby, because it is very likely that several of them have their developer signatures revoked at that time.