Comments on Alarm Sticky

A

Atilla

ok then, put it this way.

hello madam /sir, your battery is 5 years old.

the makers say i should change it.

my meter readings say it is ok, my tinpot tester from ACT says its ok, but i can leave it if yoiu like and wait till it causes you grief or change it now which would you prefer?

not rocket science is it?


where do the manfs SAY i MUST replace it ?




they dont and you know they dont
 
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B

breezer

it does not state that Atila must change it, it says the life expectancy is just over 5 years (similar words)
 
B

breezer

at the bottom.


yuasa.jpg


it claerly shows after 5 years it will be of little use
 
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A

Atilla

at the bottom.



it claerly shows after 5 years it will be of little use

like I said - the manfs DO NOT say remove after 5 years as even they know a 5 year old battery can be perfect;y servicable


your chart simply shows that given two constants (temp and charge) the battery will be still capable of providing just under half of its MAXIMUM capacity

now your not seriously going to suggest that the variables are constant and or that you need to draw full power from your battery now are you, that is a bad system design
 
B

breezer

no you are right i am not.

i just offer to change it instead.

I dont really care what you do with a battery, i sleep well at night, so do the people i have changed batteries during the day for.
 
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Service life or „design life“ is the period of economical use of a battery under permanent float-charge voltage conditions with up to 1-2 discharge cycles over 6 months time. Due to unavoidable corrosion of the positive plate inside the battery over time, the capacity decreases continuously.

If the residual capacity approaches 60% of the nominal capacity for NP, NPL and NPC batteries, then service life is heading towards its end.

The above is taken from Yuasa Battery (Europe)

Have a look at the chart, also from Yuasa
 
A

Atilla

Service life or „design life“ is the period of economical use of a battery under permanent float-charge voltage conditions with up to 1-2 discharge cycles over 6 months time. Due to unavoidable corrosion of the positive plate inside the battery over time, the capacity decreases continuously.

If the residual capacity approaches 60% of the nominal capacity for NP, NPL and NPC batteries, then service life is heading towards its end.

The above is taken from Yuasa Battery (Europe)

Have a look at the chart, also from Yuasa


yes and your point is ?


as I`ve been saying all along a battery doesnt die on its 5th birthday, I see many many 8 / 10 / 12 year old batteries with more than 60% residual and many which are gone before there 2nd year

even the O/P has agreed that the original comment " THE BATTERY HAS TO BE CHANGED EVERY 5 YEARS ......" is simply wrong


whever you think your providing a better service by changing (and charging for ) components that dont need changing is between you and your concience
 
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Following the thread, how do people on here check the battery, is it by:

1) Putting on a known load for a duration of time

2) ACT battery tester (lighter model or IBT)

3) Internal resistance meter (programmed with manufactures characteristics for the battery under test)

4) Open voltage multimeter reading

5) Measure charging voltage and current

6) Never check it and wait for the charging circuit to fail

7) Visually check it for signs of swelling

8) Shake it to see if the thixotropic gel has dried out and the
battery 'rattles'

9) Change it after 5 years anyway

10) Change it after 3 years anyway (we do this option)
 

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