10 Battery Test: Electric Duos.
Do you want a modern rechargeable battery to appear under the hood of your car, which is not afraid of deep discharges, quietly produces high currents, takes charge well and has excellent foolishness?
Respect to skeptics who understand: such a battery will be twice as expensive https://cdn-104.anonfiles.com/VeLfT5pdv6/614db284-1639069013/Epson%20L382%20Multifunction%20Color%20Ink%20Tank%20System%203-In-1%20Printer-manual.pdf as the usual one, and at such a price all the listed advantages shyly fade away, requiring more careful bookkeeping. This is what we decided to do.
For the study, we selected brands in the line of which there are two types of batteries - the so-called AGM (with absorbed electrolyte), which have all of the above properties, and conventional ones. Moreover, we were looking for batteries in the European version, with dimensions of 242 × 175 × 190 mm. These are installed, for example, on Volkswagen Polo, Skoda Rapid, all frets, etc.
There were five such duets - the Banner, Bosch, Warta, Deka and Mall trademarks. All products were purchased by the editors for cash in regular stores.
WHAT IS AGM.
AGM batteries are the same lead acid https://cdn-108.anonfiles.com/rcm1Kdp1v8/4072257d-1639040691/Bata%20Shoes-manual.pdf products that many generations of motorists have become accustomed to, but significantly improved. AGM (Absorbent Glass Mat) is a technology for manufacturing batteries with absorbed electrolyte, which impregnates the micropores of the separator. The free volume of micropores is used for closed recombination of gases; as a result, water does not evaporate. Hydrogen and oxygen leaving the negative and positive plates, respectively, enter the bound medium and re-combine, remaining inside the battery. The internal resistance of such a battery is lower than that of "liquid" batteries, since the conductivity of the fiberglass separator is better than the traditional "envelopes" made of polyethylene. Therefore, the battery is capable of delivering higher currents. The tightly compressed plate pack prevents the active mass from crumbling, so that the battery can withstand deep cyclic discharges. She can work upside down. And if you break it to smithereens, then there will be no poisonous puddle: the bound electrolyte will remain in the separators.
The advantages of AGM batteries are fully revealed in cars with a start-stop system and with increased energy consumption (Emergency Situations Ministry vehicles, ambulances), etc.
BY CLOTHING AND BY MIND.
Let's put aside the ammeters with voltmeters for now and look at the labels. The highest declared current, 750 A, was not at all with the AGM battery, but with the usual Deka Gold. The most modest current applications are for ordinary Bosch and Warta: 540 A.
The average weight of AGM batteries is almost one and a half kilos more. The MOLL 8 10 60 model turned out to be the lightest in the AGM camp - it is lighter than the usual “Deck” and “Banner” models!
And this is a clear symptom of the subsequent failure in the tests: something was clearly not put into the battery. The test winner, whom we will name a little later, turned out to be more than two kilograms heavier.
The declared capacity of the participants is from 60 to 63 Ah.