Duracell Platinum AGM 47 (H5) car battery

This Consumer Reports best buy absorbed glass mat (AGM) model has been tested by our experts.  It has excellent life, reserve capacity, and cold cranking amps performance.  It comes with a 36 month free replacement warranty.  This model does come with a handle which can make installation less difficult.


The Duracell Platinum AGM 47 (H5) is part of the Car battery test program at Consumer Reports. In our lab tests, Car battery models like the Platinum AGM 47 (H5) are rated on multiple criteria, such as those listed below.

Life: Life test measures how a battery endures repeated charge-and-discharge cycles at hot-climate engine-compartment temperatures. The more cycles endured while maintaining a higher voltage, the higher the score.

Reserve capacity: Reserve capacity estimates how long batteries can run a car if the charging system fails.

CCA: CCA performance reflects voltage at our load of half the average claimed CCA for each group size after cranking for 15 seconds at 0º F. We charged batteries at the 14.5 volts that vehicles typically supply, rather than the higher voltage that manufacturers use. Batteries charged at the lower voltage met BCI voltage standards for a fully charged battery.


Handle Handle A plastic loop makes it easier to lift and carry batteries, which weigh about 40 pounds.
Has removable caps Has removable caps Removable caps allow you to check or refill the electrolyte levels as needed.
Claimed CCA Claimed CCA Claimed CCA is the manufacturer's claimed performance that appears on the battery.
Warranty Warranty Warranty reflects the free-replacement period and the total prorated periods in months.