![]() There are some arms which hang down into each cell, Fill to within 1/8" of these arms, when the battery is already fully charged. Note that does not mean filling the battery cells to overflowing. ![]() People in hot climates wanting to extend their battery longevity would not only keep it fully charged, but would top the battery off with distilled water to lower the acid concentration slightly so that the hot sulfuric acid does not chew on the plates as rapidly. The recently topped up battery would perform worse on an actual Load test for CCA than it would when its electrolye level was just above the plates. How many of you have noticed a battery seemingly beahving poorly, to find low water levels, then fill it back up, to have the battery jump off the cliff soon after? Filling it up reduced the strength of the likely already weak electrolyte on the likely already sulfated battery and then it performed worse. ![]() It will also read a higher rested voltage and perform slightly better, holding higher voltage under loads. Likewise a battery that is low on water but is still above the plates, if fully charged, will have a higher specific gravity reading than one which was recently topped off with distilled water, and fully charged. The exact numbers are not important, the density of the electrolyte meant for a cold climate is higher than that intended for a hot one.ĭo not confuse specific gravity with voltage, I did not screw up the placement of the decimal point. N and S designations have absolutely nothing to do with plate thickness, it is about the density of the specific gravity.Ī battery meant for cold climates might have a fully charged specific gravity of 1.300, and a battery meant for hot climates might have a full charge specific gravity of 1.265. Every 10 degrees C doubles the rate at which the electrolyte chews up the plates That doesn't make them the same battery, though.The hotter the electrolyte, the more it eats the plates. Unless it's changed in the last year or so since I left, all of the batteries Walmart sells are manufactured by Johnson Controls (I believe this includes the Champion batteries, if any of the stores still sell them), the same OEM as Interstate, AutoZone, Optima, etc. If I recall correctly, the warranty was recently changed on the MAXX batteries to 3 year free replacement + 2 years pro-rated, so it's not as good as it was, but it still helps. If they pass the first year, 3 years is the next most common. In my experience, it is most common for Walmart batteries to die within the first year. This means that if you buy a battery with a 3 year warranty and it dies after a year and is replaced, you now have a brand new battery with a 2 year warranty. When a battery is replaced under warranty, if the store is doing their job correctly (they probably aren't, but let's assume for a moment), the warranty does not "restart" with the new battery. That doesn't make them the same battery, though.Īs far as the cost difference goes, let me put it this way. Click to expand.Unless it's changed in the last year or so since I left, all of the batteries Walmart sells are manufactured by Johnson Controls (I believe this includes the Champion batteries, if any of the stores still sell them), the same OEM as Interstate, AutoZone, Optima, etc.
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