You don't say where you acquired your batteries from, nor do you say what their history is - used?
I do see that there are ads that offer 'greenworks' batteries from Alibaba. Maybe they are counterfeit, maybe they are legitimate. Maybe they've been treated harshly in transit, maybe not.
Lithiium-Ion batteries explode in flames. Charging them wrongly is one way to make this happen.
No one knows what is happening with the batteries you have unless they open the casing and check them. You'll have to inspect each individual cell with the proper measurements.
No, they can't be repaired. You may be able to determine that some parts are still not damaged, and use those, but you'll need to replace any damaged cells or damaged electronics.
It may be obvious on inspection that a particular cell is damaged (scorching, physical breach of the casing, etc.) but it's rather uncertain if a cell is good.
"i dont look"
This is not the right attitude for working with parts that will burn your house down.
I recommend you begin here:
battery fires
I posted at work about Li batteries in cheap scooters. One of the responses was from a co-worker who is also a long-term volunteer with State Emergency Services here (DFES). He commented that he had lost count of the number of fires he had attended that were caused by people leaving battery packs on the charger all the time.
Do as you think best.
