LT2700 Silver Eagle battery

[VRR.DYNDNS>BIZ]

What I have in it is an Interstate SP-35. I think it has 300 cranking amps, which should be sufficient. It started the mower with ease last year, but I had to jump it off with first start of the season. It takes a full charge, but it still struggles now. It was manufactured 2019. They are only warranted for 6 months. I'm wondering if I could put a small side post car battery in. It would give it more cranking amps and probably last longer. Any suggestions?

That battery needs to be load tested and I would bet it is toast. There is a reason that even Interstate only offers a 6 month warranty on these batteries. They sit to many days with nothing happening and the charging systems are marginal if the unit is run at lower rpm's. 300 cranking amps is sufficient unless the valve lash is loose and the decompression is not working with a mechanical ACR system, if so equipped.

 

[bertsmobile1]

What would make a battery take a full charge but not deliver full amperage. I’ve cleaned the cables. I can’t think of anything else unless the battery is under powered to begin with. I guess I could put an ammeter on it to see how many amps it is truly delivering. Thanks for your response

Full charge is when the paste on the plates is at it's maximum potential VOLTAGE
Amps is determine by how deep the paste is and how deep into the plates the full potential has happened.
Automatic chargers measure the resistance in the battery to determine the state of charge but this is not the beast way to do it as internal faults will raise the internal resistance fooling the charger that a 1/4 charged battery is fully charged.
The rate the charge can be used by the mower , called the CCA is determined by the number of plates , the size of the grains in the paste & their chemical composition, the purity & volume of the electrolyte, the spacing of the plates and the efficency of the internal electrical connections .

A lot of this is hit & miss, so every battery coming off a production line gets tested
The best get a premium brand sticker on the side.
from there on in they get progressively cheaper brand stickers on the side till they get to supermarket quality.

Now here is what muddies the water
Walmart probably sell over 10,000,000 batteries a year
But the battery factory hopefully will not make 10,000,000 trash quality level batteries a year so in order to supply the volume of junk level batteries ordered, the factory will regularly put a junk brand sticker on a better quality battery. Thus you might get a top quality batteryy for the price of a junk quality battery from Wallys or you might get a junk quality battery, just like you might win a prize in a lottery.
Howeer you should never get a rubbish battery from an auto electrcian or battery specialists unless you go for the cheapest one on the shelf.
A top shelf brand should always be top shelf quality .
This is why you get all those You Fool videos with some turkey brain with no understanding on how things work, telling every body that batteries are a con cause his $ 20 cheapie ran far 10 years without a problem ( he just got an upgrade battery with a low grade label )
FWIW dry cell batteries and spark plugs are the same .
Most brands come out of the same factory because it is not economic to run 50 different factories,

 

[Hammermechanicman]

I hate to say it but i have had very good luck installing the Strongbox brand of batteries from John Deere. If the wallyworld and tractor supply batteries last 5 years i tell folks you got your money's worth. I regularly see the JD batteries last 7-9 years. They cost more but they do seem better. I don't know who makes them for JD.

 

[Graeden]

I hate to say it but i have had very good luck installing the Strongbox brand of batteries from John Deere. If the wallyworld and tractor supply batteries last 5 years i tell folks you got your money's worth. I regularly see the JD batteries last 7-9 years. They cost more but they do seem better. I don't know who makes them for JD.

There should be a listed manufacturer on the label, or look for a code in the molding. It would be interesting to see if they are Clarios (was Johnson Control) or East Penn. If they last the amount of time you state, I would bet they are East Penn made as EP produces great batteries.

 

[VRR.DYNDNS>BIZ]

Find a local farm store that sells Deka batteries as they are much better than Interstate brand.https://www.eastpennmanufacturing.com/contact/where-to-buy/

I disagree interstate is in any way inferior. Yes battery quality is by far an issue. The best battery will be severrly or completely damaged by being dead for 24 hours by allowing sulfation to destroy it.

 

[Graeden]

I disagree interstate is in any way inferior. Yes battery quality is by far an issue. The best battery will be severrly or completely damaged by being dead for 24 hours by allowing sulfation to destroy it.

That is your opinion. Compared to Deka or Odyssey, Interstate is an inferior product. Can you provide a link proving your statement that a battery will be severely damaged within 24 hours of complete discharge?

 

[VRR.DYNDNS>BIZ]

That is your opinion. Compared to Deka or Odyssey, Interstate is an inferior product. Can you provide a link proving your statement that a battery will be severely damaged within 24 hours of complete discharge?

Google battery sulfation and learn. So now you prove which batteries are best - All I am saying is Interstate is not inferior, nor did I say Deka was, all I said is (all lead acid) batteries can be damaged by being dead and allow Sulfation to progress. This is a known chemical process. Foot in mouth is not my disease.

 

[slomo]

What I have in it is an Interstate SP-35. I think it has 300 cranking amps, which should be sufficient. It started the mower with ease last year, but I had to jump it off with first start of the season. It takes a full charge, but it still struggles now. It was manufactured 2019. They are only warranted for 6 months. I'm wondering if I could put a small side post car battery in. It would give it more cranking amps and probably last longer. Any suggestions?

Cranking amps has ZERO to do with longevity. Those words are mainly not totally, a sales gimmick. Your tiny mower starter only draws maybe 40 amps just guessing out loud???? You don't need 900 amps to crank a lawn mower. Also more CCA's the more plates inside the battery. More plates = thinner plates. Thinner plates = way less battery life. Thicker plates like tractor batteries are the best you can buy.

These new small batteries will last maybe 6 customer yards to 2-3 years. Brother bought a new one last season. Already needs a trip to the ER LOL.

Check your grounds or upgrade the wire size, even better idea. Do the big three upgrade like the car stereo guys do.

slomo

 

[slomo]

That is your opinion. Compared to Deka or Odyssey, Interstate is an inferior product. Can you provide a link proving your statement that a battery will be severely damaged within 24 hours of complete discharge?

If you completely drain a lead acid battery, talking stone dead, it will not fully recover in the amp hour rating. In other words, NEVER come back to 100% fighting capability.

slomo

 

[slomo]

"Full charge" measuring 12.5 to 12.6 volts is not an indication of capacity. Try to start it while measuring battery voltage. What does it drop to?

In voltage it does. The word capacity you used, you were talking about amps. I see where you are going. Normally, normally, 12.6 is fully charged.

slomo