Right, i know charging a flat battery is'nt rocket science, but mine is that flat the charger does'nt recognise that it's there, any ideas on how to get it started.
Brad.

it's probably knacked but google says:

quote:

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Why won't my battery take or hold a charge? A battery may not accept a charge for several reasons. Your battery may have a bad cell or an internal short and therefore be irreparable. Or it could be so severely discharged that it will require a professional callibre charger to charge it. Many home chargers have minimum voltages that must be present in the battery before the charger will switch on. Normally these low voltages are well below those exhibited by a battery that appears to be "dead."

Often however, the battery is not given the adequate amount of time to accept a charge. One of the best tips regarding battery charging is to observe the charger's ammeter swing needle (available on some chargers) during the charging procedure. After the charger is connected to the battery and is on, the needle should deflect to a high amperage level if the battery is partially discharged. If the battery is severely discharged, the needle only deflects slightly away from zero. Continue to observe the needle in either situation. On a normally discharged battery only, the needle will start to taper in amperage back toward zero, usually in less than five minutes. This reduction in amperage typically indicates the battery is accepting a charge. On a severely discharged battery, the needle will start off very low then rise. This rise of the needle is a preliminary indication that the battery is accepting a charge.

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All of the above.

I would give it a while to start charging.

If nothing happens, the battery is almost certainly, FUBAR

Ronnie

What is the pc540 thread, i have done a search and nothing.

See http://www.locostbuilders.co.uk/viewthread.php?tid=79513

There's a fair chance that a 100% discharged battery will have warped its plates, or at least screwed up the chemistry of the acid & plates.

I had a battery in a similar state - tried a normal charger, then an Oximate (or whatever it's called), but neither could bring it up.

I had to dispose of it in the end.

jump leads to a car will take it's voltage up high enough to be recognised

then slow charge for a whole day till you can hear it's fizzing.

It will be fine, my volvo did this to two of my good batterys when the alt packed it, both now work fine.

[Edited on 19/12/07 by Mr Whippy]

I have thought of changing it for a bike battery, but not quite yet, i think i will try jump leads just to get the charging started.

If you're managing to kill a car battery I wouldn't bother with a bike battery- they're even more fragile!!! My one is cossetted year round with an optimate- I killed 2 before getting that by letting them self-discharge...

modern batteries dont like going flat,best get a new one or it will bite your bum when you least need it