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Home > Archive > Electrical Engineering > October 2006 > battery level
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| Warren Thai 2006-10-27, 9:25 am |
| how would you go abouts measuring a battery's level ie how full it is.
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| Palindr☻me 2006-10-27, 9:25 am |
| Warren Thai wrote:
> how would you go abouts measuring a battery's level ie how full it is.
>
>
Go down to the magazine and count how many shells are left. Add the
number in the ru lockers..
Hint. There are many types of battery. If yours is an unsealed
lead-acid, you might use a battery hydrometer...
--
Sue
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| daestrom 2006-10-27, 5:25 pm |
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"Warren Thai" <wthai@tpg.com.au> wrote in message
news:4541cb27@dnews.tpgi.com.au...
> how would you go abouts measuring a battery's level ie how full it is.
>
Submarine batteries, we used a 'height stick'. A glass/clear-plastic tube
(acid resistent of course), marked off in 1/8 inches. Put end through a 'T'
handle, so when put into the service cap hole, the cross-bar of the 'T' sat
flush on the top of the cell. Put your finger over the top of the tube
sticking out, and then pull the whole thing up out of the cell. Electrolyte
is kept in the tube, much like a drining straw with your finger on the top
of it. Measure the level in the 'straw' (the markings make this a snap),
then put the end back in the service cap hole and release your finger to
drain it back into the cell.
Lather, rinse, repeat....
Make your own, just use a tubing that is 1) clear so you can see the
electrolyte inside it, 2) acid resistant. For a small battery, just put it
down inside until it touches the plates, cover the end with your
thumb/finger, retract and take the reading.
Some good sized 'stationary batteries' have cell jars that are clear for
this very reason.
daestrom
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| Warren Thai 2006-10-28, 3:25 am |
| Sorry I should have worded it better, what I meant by battery level was like
how much left of charge there is. kinda like in mobile phones where the bars
tell you how much battery is left to power the phone.
"Warren Thai" <wthai@tpg.com.au> wrote in message
news:4541cb27@dnews.tpgi.com.au...
> how would you go abouts measuring a battery's level ie how full it is.
>
>
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| Palindr☻me 2006-10-28, 9:25 am |
| Warren Thai wrote:
> Sorry I should have worded it better, what I meant by battery level was like
> how much left of charge there is. kinda like in mobile phones where the bars
> tell you how much battery is left to power the phone.
>
>
> "Warren Thai" <wthai@tpg.com.au> wrote in message
> news:4541cb27@dnews.tpgi.com.au...
>
>
>
>
You do need to specify what sort of battery - eg nicad, alkaline, car
battery, sealed lead acid, etc.
Some batteries have an output voltage that drops as the battery is
discharged, so the voltage gives an indication of remaining charge. Some
provide access to the liquid electrolyte and the density of that gives
an indication of the remaining charge. Some burn a hole in the side of
your laptop to show that they were, indeed, well-charged...
--
Sue
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