I bought the two pack Ryobi Lithium-Ino Batteries along with the six battery Ryobi One + Charger. When I use it on my P201 Ryobi 1/2 Drill and the drill encounters any type of a torque situation the battery shuts down. The torque encounter can be as small as tighting a bolt or a drill bit stopping while drilling a piece of metal. The battery must be removed and put into the charger for 30 seconds before it will work again. It happens with both batteries and has happened since the first day I purchased them four months ago. My son purchased the entire drill kit and had the same problem, he ended up retuning the kit. Are these batteries deffective?