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Post by DuckMaster on Jan 17, 2024 21:46:42 GMT 12
Yup there you go all plugged in. Now the battery is good enough it doesn’t need a charge, the charger is happy to oblige. What’s the freaking point in a charger then, if it can’t get you out of a hole with a fully flat battery?! Why don’t they have a ‘resurrect the dead’ button? It could just be labelled “Press for God”. There's often a button for 12v power supply mode. That will just put out 12v without any smarts. That's enough to get some charge back in the battery and then you can put it back on "smart" charge. |
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Post by GO30 on Jan 18, 2024 9:40:00 GMT 12
I was sussing my chargers last night, a range of Victrons, and one can be used as a power supply so it does have a 'take this bitch' function where it throws out juice no matter what and without thinking, but bit is very manual when used as a charger. That's probably the function Ducky mentions above. It took a decent read of the manual to understand what it was so I'm in with Ducky and Fish. Read the paperwork and you may find you also have that function.
Note and it is something I didn't realise until it was too late - the new charges are often very battery size specific. I put my bigger charger (will bang out 50amps at 24V if needed) onto a 35ah battery which made a bloody good battery into a door stop, killed it dead and did so in minutes if not faster. On sussing Victron say do not use that one on smaller than 60ah batteries. All changers now have big warning stickers on them, something they didn't have before and probably should have. I now have 3 charges for the assorted battery sizes/voltages. So there is a chance the charger Mr Fogg tried was outside the range of the battery and the smarts noticed it and shut it down as a safety thing.
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Post by Fogg on Jan 18, 2024 18:26:09 GMT 12
It was a small (car) battery but it was also a small 4A smart charger so unlikely to be hammering any battery any time soon methinks?
I read the destructions and it just said I either had leads wrong way around or badly connected. But nothing about not liking totally empty batts.
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Post by eri on Jan 18, 2024 19:10:50 GMT 12
4A is less than my laptop
i have used laptop chargers as battery chargers for a snowblower in japan
the 15volt acer charger would drop to about 12 volts on the snowblower battery so would then top it off with a 17volt ipad charger, which got the battery to about 15volts
once they were bubbling they were done
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