I think you batteries have a PCB chip(smart charging) built in to them Joe.
Just like cell phones, the charger is just a power supply. The smarts are in the phone. Are you as concerned about your cell phone? They also use Lithium Ion batteries. Be careful you phone may explode in your pocket, or in your ear.
JK.
If I recall correctly, there has been recalls on cell phone and laptop batteries for blowing up, or burning up.