After that cold shower, which turned out to be the first stage of testing brand new batteries (ZR, 2004, No. 11), I wanted to think about anything except the bathroom … However, everything needs to be brought to an end. We climb into the bath!
In full accordance with the Gostov methodology, the batteries in a state of inactivity should lie in the bath for 21 days at an ambient temperature of 40 ° C. Then - brr! - they were dragged from the bath to the refrigerator: by minus 18 ° С! After a daily stay in the cold, the batteries without recharging were loaded with a current of 0.6 of the declared cold scroll current. We already know: at the 30th second of such a discharge, the voltage at the terminals should not be less than 8.5 V. But in practice? But in practice - what is shown in Fig. 1. (see bottom of the material)
Well, nothing unexpected - all the faces are familiar … The unconditional leadership of the out-of-competition “Optima”, the even performance of the “back of the box” and all the same lagging behind: “Hankuk” No. 15 and “Daewoo” No. 19. Okay, now let's see how well the discharged batteries take charge. By the way, the laboratory setup is capable of delivering currents up to 3000 A - Jules Verne will envy. But we don’t need so much.
CHARGING AT ZERO DEGREES
Charged “by the neck” of the battery was discharged for 5 hours with a current numerically equal to 0.1 of the battery capacity - about 5.5 A. Then they were cooled to zero degrees and “offered” to take charge - say, take such a current as you can take it! Its value was fixed at the end of the 10th minute of the charge - the permissible minimum numerically amounted to 0.2 of the battery capacity. But actually - the more the better. The real picture is shown in fig. 2.
Become a leader - who? - right, "Optima"! Thirty-odd amperes is a boundary that other participants have not even come close to. Both batteries of Inchi Aku looked worse than the others - however, even their results were within the standard.
Is it all over? Well now
EVERYTHING IS ON THE ELECTION!
So, again about the main thing - how to choose a battery in the store?
First of all, as we have already noted (ЗР, 2004, No. 11), we choose the freshest - we don’t think about money yet. Practice shows that at this stage the screening is the most cruel - after it the set of applicants for the engine compartment registration will decrease sharply. We remind you that it is useful to measure the voltage at the terminals of the selected battery - not lower than 12.6 V!
Now we conditionally divide all the remaining batteries into two large groups - with access to filling holes and without it. If you have a modern car - read, with a powerful generator and high stability to maintain on-board voltage - then the choice is clear: we take the battery without access to the "giblets". A serviceable battery of this kind will work for you for four years, or even more - with any luck. Its self-discharge is minimal, and the charge takes a bang. But if you have, say, “Lada”, then it is better to take the battery “submarine”. We can act on it, for example, to revive after a deep discharge, if such, God forbid, happens. Let's say they put the car in a long parking lot in the garage, and something “barked” in the wiring - it happens … So, practice shows that a low-antimony battery, even a “dead one,” usually comes to life after a few days. Her calcium colleague is more effeminate and most likely will not forgive such an attitude. And the price of such a battery is usually lower than that of more modern products.
For those who tinker with the battery on their own: the battery, filled in the factory, is always better than the one that was poured in the garage or even at the service. The reason is in the electrolyte: liquid of unknown density and purity often gets on sale. Distillers also use different ones today: they rarely use expensive medical devices, and therefore, in practice, almost tap water comes into play.
As for the price of the battery, its brand and other external attributes … All this can be a subject for discussion, but only at the final stage, when “they choose according to their clothes”. We do not recommend overpaying for one big name and acquiring products based on the brightness of the labels: after all, the same Optima is far from a beauty. However, we have already expressed our opinion.
SO WHAT IS NEXT?