Could be a bad charger too. And which KR808? KR808D-1 or the ripoff rebrander fave KR808D-2? Or unlikely but do you mean the super-mini 808A or 808B? We usually abbreviate KR808D-1 as KR8 since ECF will underline that and give it the correct hover text.
If V2 brand (an overpriced KR808D-1), yes people get broken parts them them - I swear they must send the same returned parts out over and over. Don't buy from them.