Usually the downloader you need depends on the website you want to download the images form. In general, here are some opensource ones which support a variety of websites: gallery-dl, ripme and various other ones on github. There for paid ones, there are Extreme Picture Finder and Bulk Image Downloader, which have easier to use GUIs and are properly maintained, but as said, they are paid. Source: about 3 years ago

Yeah, I found bulkimagedownloader ages ago but its not a free tool. Not sure of what limitations the trial have. Source: about 3 years ago

You can check the cycle count using the System Report app in the power section. Alt click on the Apple logo is a convenient shortcut to open System Report. There is also the third-party Coconut Battery app that gives you other nice statistics and keeps track of battery health if you open it occasionally. https://coconut-flavour.com/coconutbattery/. - Source: Hacker News / 5 months ago

As for the battery not lasting 12 hours in sleep mode (I assume you mean sleep...) it's most likely doing some indexing in the background and will be okay soon. You can check the battery heath using Coconut Battery: http://coconut-flavour.com/coconutbattery/. Source: about 1 year ago

You can check the cycles count with Coconut Battery for Mac or iCopyBot for Windows. Source: over 1 year ago

You can’t really tell anything from that screenshot. I’d ask the seller to use a shortcut like PowerUtil to check the battery health and cycles (alternatively, you could use coconutBattery on a Mac or iMazing on a Windows PC. Source: over 1 year ago

Possibly battery (use Coconut Battery to check battery capacity). Source: over 1 year ago