I have a Dewalt 18v drill. I have replaced both batteries. What happens is I can put it on the charger for 15 min and have full charge but 10 min later the battery is dead so now pretty much when I need my drill I have to charge 15 min. I have left on for 2 hours and only get 12V but can get 23 in 15 min. Any thoughts? I charged them both up. Next day I went to use the drill and both batteries were completely dead Sent from my iPhone using Tapatalk