I have Purchased 8 of your 18v Cordless tool along with P102 Batteries. Have your Reciprocating Saw, Angle Grinder, Drill, Miter Saw to name a few. The Problem I have are the P102 Batteries Constantly Not being able to be charged and Over Heating .I have three totally useless Batteries, all P102 model. Because of this I have to Conclude this Product is Defective. I have Checked online Reviews and Posts about these Batteries and the same Conclusion is drawn.There is much info about " Jumping these Batteries, I will not try this.I would appreciate if you would address this with me.