13.2 seems low, but I don't know what most lawn mowers do. That might not be enough to maintain a battery. My grasshopper is 14.2 like most other engines. Low charging voltage will ruin a battery over time.
Car batteries are not mechanically strong enough to be used in a mower unless it has suspension.Hello all, I have bought a bunch of Walmart mower batteries. They outlast the 90 warranty and that's about all. I would like a battery that will last a year or two. Or should I mount a car battery between my feet! All reply's much appreciated..........Jay
Interesting, how do you measure internal resistance?Even the cheap box store batteries should last more than 90 days. When i buy batteries i take a tester that measures internal resisrance and find the one with the lowest resistance. Much better test of battery condition than a voltaget test. I wonder what the early failure mode of the the batteries is? What is the charging voltage? Where is the mower stored? Is there a parasitic draw?
Interesting, how do you measure internal resistance?
I'm also interested in this answer!Even the cheap box store batteries should last more than 90 days. When i buy batteries i take a tester that measures internal resisrance and find the one with the lowest resistance. Much better test of battery condition than a voltaget test. I wonder what the early failure mode of the the batteries is? What is the charging voltage? Where is the mower stored? Is there a parasitic draw?
Thanks....never heard of one of those testersThey commonly call these CCA testers. They measure the internal resistance and voltage to calculate CCA. They are very good at telling you the co dition of the battery. As batteries age the internal resistance goes up.
ArtiBattery101
ArtiBattery101 Car Battery Tester - 12V Car Auto Battery Load Tester on Cranking System and Charging System Scan Tool, TT Topdon AB101 100-2000 CCA Battery Tester Automotive for Cars/SUVs/Light Trucksobd.topdon.com
Batteries over time can and do short cells to one another. They have a sediment tray in the bottom of the case. When a car or mower hits a bump, over time, small bits of lead fall off the plates and land in the tray. Again over time, this tray fills up with lead. And now thanks to salesmen and corporate giant companies squeeking every penny, the trays are SMALLER and offer the ultimate sales gimmick, more CCA's. So now, they offer thinner plates to stack more plates in the case = more cca's. So we think wow, this battery has 1000 cca's and it's wonderful. Now, with construction paper thick plates LOL, no wonder these new batteries don't last for 4 sneezes.Just read through the description of this unit and it is just a small load tester, used in the automotive industry for years. One correction, it cannot measure resistance, as resistance is measured through a solid object. Any sort of voltage flowing through an object while testing for resistance will ruin a meter. In a battery there is no solid connection, if there where the battery would have what is called a dead short. Mechanics normally call it a bad cell.
In the US Army, we had pallets of dead Optima red tops. Years, I mean decades ago, when Optima came out on the market, they were good batteries. Like Bert said, lasted a long time. Today I think they are made in Mexico??. Nothing against that but they are sh_t now. Corporate America got a hold of them. Drove a good company into the ground. Only thing I like about them is they do not leak and corrode terminals. Every base overseas I went to, the motor pool had shoulder high pallet loads of dead red tops and yellow tops. Some reason they kept ordering them new?? Must of had a contract of course.Actually both of them, and a dozen more are done to every battery as it comes off the production line.
No factory deliberately makes low quality batteries.
All of the battery lines are designed to make premium batteries but like all production line processes not every battery will be perfect.
The ones that are not perfect will end up in Walmart, , HF and other discount retailers.
When I first started battery grids were 2.5mm thick
By the time I left they were 0.5mm thick but made from a slightly stronger alloy
However drop one from waist height onto the floor and 3/4 of the plates will have broken free of the single busbar that holds them in place.
This is why I told you that ab AGM battery is far far stronger because the mat provides a lot of support for the plates.
Pressure Valve regulating prevents the battery self discharging by preventing the evolution of hydrogen gas.
The down side is mower owners are cheap bastards who point blank refuse to pay what anything is worth so there is no way any one will pay $ 250 for a battery when they can get one for $ 75 ( $ Aus) .
It is as simple as that.
Car makers demanded we make cheaper & lighter batteries and will accept anything that had a mean time between failure of 18 months ( warranty is 12 months )
OTOH the car makers branded batteries sold through parts shops were premium batteries with a service life of 10 years.
Hawker-Cyclon developed a battery for aircraft use that could take a massive amount of abuse , provide massive CCA , recharge very rapidly and have no self discharge.
These were spiral cell batteries and are available to Joe Public under the Optima brand.
These are head & shoulders the absolute best battery money can buy but no one would ever fit one to a lawn mower because they are too much of a cheapskate.
I run Cyclons in all my motorcycles in many cases upside down they will last better than 10 years (one is now 18 years old ) but they cost me $ 120 .
We ran Optimas in our entire fleet of courier vans and in 20 years never had a battery or alternator problem with the entire fleet
But again these were $ 350 as comparred to $ 65 from a cheap car parts retailer.
I blew a truck drivers brain when we jumped his Kenworth / Cummings with the battery from my L 300 & a standard battery from one of the forks to make 24V
The yard manager was so impressed he bought 40 of them for all of the fork lifts which were forever suffering from flat batteries
Everything else is just Ford vs GM brand bull dust
Does that apply to the Wal-Mart Ever Start car batteries? Also then what brand got the good ones that might not hike the price real high for lawn tractors?Car batteries are not mechanically strong enough to be used in a mower unless it has suspension.
Motorcycle batteries and in particular AGM PVR motorcycle batteries are by far the most robust aside from spiral cell batteries which are even stronger.
As for Walmart, every battery that comes off the production line is tested.
The good ones get the top line brand stickers put on it.
The ones that just barely pass go to Walmart
I made batteries for a long while and that is exactly what happens
On our lines the batteries came off then line , got a serial number fused into the top then wend down the paint line to be painted what ever company the quality of the battery dictated.
Having said that if we had to fill a 10,000 unit supermarket brand battery & did not have enough dud ones in hand then we would add some good ones to the garbage pile.
I beg to differ on that statement.As for the best , that will be the Optima Spiral cell batteries
Interest I saw somewhere a guy said the lower CCA one's lasted longer because of somehow the plates were smaller or bigger and farther apart I think he said.My Toro battery that came w/it in 2014, lasted almost 5 years. And it was way under-rated CCA's for what the manual called for. That was a fine old machine.
I just put in a Sears Die Hard lawn tractor battery. The last one lasted over 10 years.Hello all, I have bought a bunch of Walmart mower batteries. They outlast the 90 warranty and that's about all. I would like a battery that will last a year or two. Or should I mount a car battery between my feet! All reply's much appreciated..........Jay
Me too, on my Liberty......On my old Cub Cadet,I don't know if it helps, I put a piece of floor mat under battery,a little bit of cushion