2007 with P0a80 and manual latch for hatchback won't work.

Manual trunk release yeah where is that.

 

will 12 volts not open it electrically?

 

On a gen2 the rear latch motor is in the floor. As a result you pull the hatch floor up to access the manual release.

Remove cover of latch motor​

Once I had to move the manual release while jiggling the hatch door from the inside. There may be a way to unbolt the latch motor from that same access. Or if push came to shove pull out the angle grinder and try to cut off the strike.

 

what you see on Dr Prius are blocks not "cells", a block has 2 "modules" and this is the one where you can buy elsewhere and swap/replace. Each module has 6 cells which are not replaceable. If you drive it long enough it will throw a code like "Block XX is getting weak" which mean it's voltage difference from other blocks is greater than .3v, looking at your graphs you have a voltage difference of 2v which is really high. Swapping modules will work but it also depends on your luck on how you reconditioned or swap the modules. They need to be at the same capacity (balanced) and sometimes it will last for a day, a week, a month or years but don't expect something long term.. worst if it could leave you on the side of the road for longer trips.

 

If electrically it clunks but doesn't unlatch, and moving the lever (that you know from another car is the right lever) doesn't unlatch, it would seem something has failed in the latch. That doesn't seem like a common issue anyone else here would have advice about. It'll be a challenge. You may have to look for ways to carefully destroy the latch or the strike without destroying what's nearby.

 

Usually the latch has cloth or plastic jammed in it.

 

Any sign the hatch or nearby areas are or were bent? Pretty common for hatches, trunks, and doors to refuse to open if they are bent enough that it puts force on the release mechanism.

If it sounds like the release is trying to open when 12V is present perhaps just try prying the hatch open "gently" when the latch should be open. Bang on it a bit. Push outward at the bottom, inward at the bottom, left or right near the bottom.. Pry up from the bottom, it might just be glued shut because the rubber seal stuck the hatch to the body. If still no go, take apart the panels around that area on the other Prius and see if there is some obvious way to disengage the latch arm with minimal mayhem. As in, find the best place to cut.

Has the OP tried a little "persuasion" on the manual release lever? If it is in the "latched" position perhaps a small crowbar across a block of wood can force it up?

 

You're gonna have to pull as much stuff out of the back of the car as possible to get better access to the metal clip so you can put way more force on it to get it open.

 

The sheet metal the latch bolts to is easy to hammer back in place after rear end collision damage if its not too significant.