Editor’s Note: We test and review every product we recommend.Read how MotorTrend tests products here. Don’t let a dead battery suck the juice out of your morning. With a little bit of preparation, you ...

I took careful notes while unboxing each product and got a real-world feel for carrying, charging and stowing them around the shop and in the car. Next came more than 50 hours in the MotorTrend test ...