Battery Charging Time
Submitted: Tuesday, Mar 04, 2003 at 19:56
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Phil P
Hi all,
I've been trying to find out charging time's for car batteries without much success, hoping someone on this
forum can help out !
I need to charge an Exide Extreme Battery N70EX 80 A/H with an 240 Arlec battery Charger ($30 Kmart version purchased 10 years ago !). The Arlec Battery Charger specs quote 5A RMS (12V 3.5A Continous).
The Battery is brand new (off the shelf).
How long do I need to charge the battery for ?
What is the lowest voltage I should allow the battery to get to before causing potetial damage to it ?
I have an Electronic Multimeter, does the voltage reading of the battery give me an inidication of the state of charge ? (current voltage reading is 12.93V - there is no load on the battery).
Thanks
Phil P
Reply By: Bob Y. - Tuesday, Mar 04, 2003 at 22:09
Tuesday, Mar 04, 2003 at 22:09
Phil, just come off the Exide site(www.exide.com.au) and the only info I noted for recharging was "fully discharged auto battery using 10 amp charger, will take 8 - 10 hours @ 80*F to reach full charge."
I'm not really up to speed with theory of these black boxes, but to
check charge you would need a hygrometer, to read specific gravity. With no load voltage @ 12.93 feel it wouldn't be too far off full chg. Those Arlec chargers aren't much better than trickle chargers, so you could give it a fair run, without damage.
Just forget the lowest voltage, for long life, but am sure it was mentioned here before. Ozi mentioned it a number of times. Think some people use a percentage, say 10% drop. Hooroo...
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