Need replacement batteries for solar pathlights. Ring customer service is a joke. Where to buy?

I purchased several solar pathlights last month. Two of them had faulty batteries and wouldn't charge. I've tried to get replacement batteries from Ring and called them numerous times. So far they've sent me battery mounting hardware for battery floodlights and now they're sending me the battery-powered pathlights as replacements. I'm sick of dealing with Ring just to get two replacement batteries. Can anyone recommend where I buy replacements? I'm not 100% sure what capacity to get so any help would be appreciated.