Yellowtops are Optima brand AGM starting batteries. AGM starting batteries are definitely worth it for vehicles running intense electronics like high power car stereos.

A red top will probably better handle the extreme loads of a winch, since it's a starting battery. Like Scott said, the yellow top is better for those long-term, slow drain type loads that might drain your battery to zero before getting recharged.

Key benefits of OPTIMA YELLOWTOP® batteries include deep-cycling battery and OPTIMAL starting power, up to 3x longer service life, 15x more resistant to vibration, leak proof, mountable in virtually any position, maintenance-free, and more than 300 discharge / recharge cycles.

While OPTIMA's Monterrey production facility is currently the only place where OPTIMA batteries are produced, OPTIMA's world headquarters and corporate offices remain in Glendale, Wisconsin, as part of Clarios. Take a virtual tour of the OPTIMA Batteries factory here.

In an application like that, they could expect to see an OPTIMA battery last four to six years. However, in a more moderate climate, like San Diego, if someone might see four years out of a flooded battery, they could see double or triple that out of an OPTIMA.

Energy cycles and most importantly basic voltage maintenance during storage have the largest.

In time, AGM batteries, including Optima batteries, may fail. Failures are often caused when a starting battery is used in a cycling application, for which a deep-cycle battery is the better choice. If you have bad AGM battery, you attach it to your charger and the charger won't even charge it.

Optima batteries have proven themselves time and time again to be the absolute best on the market for high-performance battery solutions. With batteries to fit most vehicles, they have a solution for any application.

We indicate our batteries can last up to three times as long as conventional flooded batteries, although actual lifespan can vary, based on a variety of factors, including the specific application, operating temperatures and maintenance habits.

Optima batteries have proven themselves time and time again to be the absolute best on the market for high-performance battery solutions. With batteries to fit most vehicles, they have a solution for any application.

OPTIMA is not just a battery brand, we are a battery manufacturer. We manufacture all of our own batteries in our own production facility and they are the only batteries produced there. We never re-brand, re-spec or otherwise re-label our batteries for any of our retail partners.

Fortunately, OPTIMA's Digital 1200 12-volt battery charger can recover many deeply-discharged batteries, including batteries discharged all the way down to 1.25 volts!