Battery OPTIMA or Bosch

I noticed that between 4ah and 5ah battery is little difference, but not much, 15% i would say. BUT 5.5 procore seems like 50% better than 4AH bosch battery and at least 15-20% stronger than bosch 5AH battery. When i say stronger, it is noticable in speed,strenght when i cut pellets, or drill concrete, or doing some 100mm or larger screws.

Yellow top is/was a hybrid cranking/deep cycle battery, once popular for putting big stereo systems in cars because it could handle the discharge cycles of running the system without them engine running.

Ive been using a yellow top for around 5 years in my CRV with no issues

had one in a car that rolled 4 times and it’s still working

I used euro car parts 444770127 which is a mid range bosch battery. Don't remember any issues

I’ve had an Optima Red Top in my 2012 JK Rubicon for about 8 years. My mechanic recently said the battery is on its way out, and now the Jeep is struggling to turn over. I’ve heard Optima’s quality has dropped since I bought mine.

The mechanic I go to gives me Bosch and they last around 2 years if not more. But then they do die within a day when they do.

I bought a Bosch battery from a respected online company in the UK. The only change I made was uprating from a 100Ah Varta I think the original was to a 110Ah Bosch S5 015 as I thought more storage would help as the car ages and things are naturally a bit more susceptible to failure. Battery lasted 3 years until about January/Feb 2024 when a cold snap hit and the battery just failed to hold a charge overnight.

Optima batteries have, in my experience, gone downhill over the last few years. For their price, I don’t think they’re worth considering.

I purchased one because of my car stereo upgrade, thinking it would be a better choice. Within a few weeks, I noticed that my cranking was slow and labored. It is almost seven months later, and I find myself having to randomly jump-start my car. Note: At first, I was concerned that my audio amps were not turning off properly and checked to confirm that everything was off. I think I may need to go with a different solution now.