TOPDON Battery Tester ArtiBattery 101. Worth every penny. 

A car will start with just 70A at 22C, but that doesn't mean the battery is fine if you want to start it at -18C !

@@etow8034 My battery is reading a lot higher than 70 A 😉. It starts perfectly in freezing conditions. I have seen reading differences of up to 100A in different temperatures. It should be a bit more accurate than that. Somedays it tells me to “replace” and then other days “ good battery” it can’t make it’s mind up. I do accept my 5.5 year old battery won’t be as good as new but it is still quite capable.

@@Mickytdi If you don't charge or top up your battery once every two weeks in the summer months and at least once a month in the winter months 4-5 years is all that you will get out of your car's battery. Your car's charging system only charges the battery up to 80% at best and with every ignition start you need at least 20 minutes of highway driving to recharge back that amount of capacity. The point here is that the battery is always at a deficient and will decrease with every start.

@@etow8034 i don’t have to worry about that. My car gets lots of driving. There’s 160,000 miles done in 5 years. My car is a start/stop. The battery is actually designed to stay at 80% charge because of the brake energy recuperation system. It’s sn AGM battery.

@@Mickytdi Of course they are going to say its stays at 80% charge, that is 80% at best case scenario and it will never charge higher than that. If you use the start/stop mode it taxes the battery even more along with a shorter starter life ! The point is doesn't matter how much you drive the battery will only be 80% charge in best case scenario and will be worse if you drive shorter distances with more frequent starts. Most peoples' car batteries are around 12.3V or 65%-70% charged if they don't top up their battery.

I might do that. The battery from the video is now on the garage floor. I have a Gooloo charger with a conditioning feature. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-U5IOfIixTbA.html

You would have to do it more than a dozen times to try to desulfate the plates, but it never really increases it more than 20% at best as the electrolyte has eaten away most of the lead plates.

These are all based on the Motorola/Midtronics PowerSensor testers from the early 90's that the telcos and Ford were using on the production line, but they cost $2500usd back then ! ...LoL

It's possible. I suspect a lower use, high quality battery living in an environment with minor temperature swings and recommended care and feeding, all could be well. Many quality batteries could actually measure above the 100% threshold if that was possible.

Scotty Kilmer has a video expaining why new sealed batteries are less than full when purchased. It has to do with where they are manufactured and time it takes for them to be transported to stores.

Thanks bro I didn't know that very helpful tip 👍

Agreed

Load tests are dangerous and not as accurate as these conductance testers these days. A proper charge/discharge test would over a day to perform with expensive equipment. Those handheld load testers you get for under $50 is not an accurate picture of the battery's true condition.