Looking for links or DIY to devices that recondition the HV battery

prolong charger by hybrid automotive. i would provide a link, but it always comes out as a slash mark when i paste

 

there may be less expensive options, idk. i think the prolong used to be over $600.
sometimes, they are offered for sale here, used

 

The original is the O|Rowdy grid charger:
V2-grid-charger-discharger MOD

Here's the step by step instruction for an Insight, but lot of it is still applicable for a Prius:
https://www.insightcentral.net/threads/olrowdy01-v2-grid-charger-build-illustrated.126021/

Here's the main thread here:
Build Hybrid Battery Maintenance Gear For Under $100 | PriusChat

Here's a very polished build with a nice case and schematics:
DIY High Voltage Battery Reconditioner - Grid Charger | PriusChat

Here's my build that's more expensive, but simpler to build and more reliable (in my opinion) discharging:
Prius Grid Charger/Discharger with Electronic Load | PriusChat
Build log with lots of pictures, issues, and how I resolved them:
What type of connector does a Prolong Charger/Discharger use? | PriusChat

Hope this helps.