I have a batch of cider in the fridge, put it there some 4 months ago, no clearing agents or anything like that. soo, now i'm wondering can i still carbonate this batch? if so how?!
You might want to add some yeast but other wise a batch prime in a bucket with sugar before bottling.You can use the priming calculator here...https://www.northernbrewer.com/pages/priming-sugar-calculator
I take it you bottle? As @squeegeethree said I would add a little yeast to the bottling bucket. Or now would be a good time to get into kegging.
i'll go with the wee bit of yeast not sure about kegging