Pete C. a écrit :

Boothbay wrote:

I bought a radio shack multitester to check my batteries, primarily my
laptop batteries. First on my old dead battery of Toshiba laptop, they
had a positive and negative mark shown..so it was easy to check it out
with the tester. But I bought it to check my Dell battery that lasted 1
year to the day of the end of my warranty. Fortunately, i did get a
refurbished one in time. Disappointed that it only lasted a year and I
had only used it a total of maybe 10 hours with the battery on my last
vacation...10 hours in 1 year and poof it went. The battery does not
have a pos and neg shown like the toshiba one..so I cannot test it that
way. In the meantime, I was trying to check some AA and AAA batteries
that I had and was able to understand on how to test them..but I do not
know how to interpret the readings I used the ACV side with it set at
15. I really don't know what does numbers mean. The manual is a joke,
at least for those of us that have no experience. The line moved a
little to the right where it seem to end a couple of notches on that ac
15v scale. It read the same for the new battery as well, so what is it
telling me that its a 1.5v battery? How does one know if the battery is
weak or whatever? Does anyone know of a web site that can tell me what
those readings represent? I did a search in google but nothing came to
what I was hoping for.

All batteries are DC so you need a DCV range. With a digital meter it
doesn't matter which is positive and negative as it will simply show the
correct voltage with a - sign if you have it backwards. With an analog
meter the needle will go backwards to the stop and you just have to
reverse the leads. The meter will be of limited use for rechargeable
batteries like a laptop one since it only tells you the voltage, not the
state of charge.



batteries may be DC but some chargers give out AC, it allow the use to
connect the batterie pack to the charger wihout any care for polarity
the battery pack contain diode that correct the AC to DC, that could
explain why there arent any polarity sign.. but beware laptop aren't my
speciality....

system21 u568567

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