rob190364 2,594 Posted March 23, 2011 Report Share Posted March 23, 2011 I've bought a secondhand nightsearcher 750 just to get my pup going on a few young rabbits over the summer to get her ready for starting properly in September. The bloke I bought it off had lost the charger but had a cigarette lighter charger for it. When the battery is plugged into the cigarette charger it lights up as it should do and is therefore charging. I bought a charger off ebay and it's arrived today. However, I've plugged it in and it doesn't seem to work. The LED on the battery doesn't light up (it very briefly flashes green when you first plug it in but then goes out). I've done a search of model numbers etc for the NS750 and on the nightsearcher website it says the charger is model no. CH12V750 and that it's a 240V charger. The one I've got is model no. AD-1460300RBS and it says 230V input. Is this the problem? It's it simply the wrong charger for the battery? It was listed as the charger for the nightsearcher 750 but I've left it plugged in for 20 minutes and the charger is still cold, chargers normally get very warm when they're working don't they? I was going to just leave it plugged in to see if it does charge it but I'm not sure if it can damage to battery if I do? I know absolutely nothing about electrics so sorry if some of these questions are a bit ridiculous or obvious! Any help by someone who knows their stuff would be appreciated. Cheers Quote Link to post Share on other sites
Ossie n Arch 1,682 Posted March 23, 2011 Report Share Posted March 23, 2011 240v or 230v shouldn't make any difference, 230v is the new European standard. Look at the output voltage on the charger and see what it says on that. If your charging a 12v battery up and the charger says 12v on it, then it may be faulty. If it says 14v you'll damage the battery. If however the charger says a lesser voltage it will still charge, just take longer. We use 9v,12v,14v batteries at work, but use the same 14v charger for all of them. HTH Arch. Quote Link to post Share on other sites
rob190364 2,594 Posted March 23, 2011 Author Report Share Posted March 23, 2011 240v or 230v shouldn't make any difference, 230v is the new European standard. Look at the output voltage on the charger and see what it says on that. If your charging a 12v battery up and the charger says 12v on it, then it may be faulty. If it says 14v you'll damage the battery. If however the charger says a lesser voltage it will still charge, just take longer. We use 9v,12v,14v batteries at work, but use the same 14v charger for all of them. HTH Arch. ah right, it's a 12v battery and the charger says 14.6v output.....will I have knackered the battery now then? I left it plugged in for about 20 minutes. cheers Quote Link to post Share on other sites
fox digger 1,086 Posted March 23, 2011 Report Share Posted March 23, 2011 240v or 230v shouldn't make any difference, 230v is the new European standard. Look at the output voltage on the charger and see what it says on that. If your charging a 12v battery up and the charger says 12v on it, then it may be faulty. If it says 14v you'll damage the battery. If however the charger says a lesser voltage it will still charge, just take longer. We use 9v,12v,14v batteries at work, but use the same 14v charger for all of them. HTH Arch. Quote Link to post Share on other sites
fox digger 1,086 Posted March 23, 2011 Report Share Posted March 23, 2011 it may not damage the batt if it says14volt output, there are several types of batt charger available, trickle charge, constant volvate, constant ampae ect, an altenator charging a batt has to read 14.4 volts or else it wont charge the batt.... depends on what tyre of chargeing method it uses mate. Quote Link to post Share on other sites
Ossie n Arch 1,682 Posted March 23, 2011 Report Share Posted March 23, 2011 240v or 230v shouldn't make any difference, 230v is the new European standard. Look at the output voltage on the charger and see what it says on that. If your charging a 12v battery up and the charger says 12v on it, then it may be faulty. If it says 14v you'll damage the battery. If however the charger says a lesser voltage it will still charge, just take longer. We use 9v,12v,14v batteries at work, but use the same 14v charger for all of them. HTH Arch. ah right, it's a 12v battery and the charger says 14.6v output.....will I have knackered the battery now then? I left it plugged in for about 20 minutes. cheers Quite possibly i'm afraid. You may have "Cooked" it. You'll have to try it and see, then use the car charger for now. Is the Battery a 7ah ?? I think the Nightsearcher uses them, if it is they are about £17 to replace. If you lived nearer iv'e got one you could have FOC Arch. Quote Link to post Share on other sites
Gaz_1989 9,539 Posted March 23, 2011 Report Share Posted March 23, 2011 Where are you located? I have got a brand new 12v 9ah you can have free of charge as long as you promise not to cook it :-) Regards chargers - You can get decent ones from the local "select house" or "home bargains" for about £30. They have got the crocodile clip connectors and a maintenance mode when fully charged. Also choice of 6v and 12v and standard or sealed. Hope this helps. Gaz. Quote Link to post Share on other sites
fox digger 1,086 Posted March 23, 2011 Report Share Posted March 23, 2011 a fully charged 12volt batt will read over 12volts on a volt meter, if it is below 12 its knackered, sounds to me like the charger just aint workin, your lamp should light when plugged into the mains charger if the charger is working correctly, if you get a short piece of wire and rub it accross the two poles you should get a light spark, if you do your batt is still fine, if no signs of arcking then its bet im afraid mate. Quote Link to post Share on other sites
rob190364 2,594 Posted March 23, 2011 Author Report Share Posted March 23, 2011 it may not damage the batt if it says14volt output, there are several types of batt charger available, trickle charge, constant volvate, constant ampae ect, an altenator charging a batt has to read 14.4 volts or else it wont charge the batt.... depends on what tyre of chargeing method it uses mate. hmm, I'm not sure what charging method it uses to be honest... this is the lamp/battery spec - http://www.nightsearcher.co.uk/Products/tabid/55/agentType/View/PropertyID/13/Default.aspx and the pic below is the label on the charger. Can you tell of this if they're compatible? the bloke I bought it off insists it charged his 750. cheers Quote Link to post Share on other sites
rob190364 2,594 Posted March 23, 2011 Author Report Share Posted March 23, 2011 a fully charged 12volt batt will read over 12volts on a volt meter, if it is below 12 its knackered, sounds to me like the charger just aint workin, your lamp should light when plugged into the mains charger if the charger is working correctly, if you get a short piece of wire and rub it accross the two poles you should get a light spark, if you do your batt is still fine, if no signs of arcking then its bet im afraid mate. It's not a car or motorbike battery though so there aren't any poles to put a wire across, there's just a port for the charger and a port for the lamp. It still works with the lamp though so I'm assuming I haven't knackered it. Quote Link to post Share on other sites
matt_hooks 188 Posted March 23, 2011 Report Share Posted March 23, 2011 (edited) A "12 volt" battery charger will output more than 12 volts. 14 volts is not unusual. It's unlikely to have done any damage to the battery (in fact, there is a method of reconditioning batteries that involves using a much higher rated battery/charger) The most likely thing is the charger is fnorked. The alternative is that the polarity is wrong. Does the car charger have any indication of polarity? The image you put up has the polarity as + on the centre pin, and - on the outside (you can see the little diagram, dot with a line coming from it to a + sign, and the outside ring with a - sign near it. Does the car charger have a similar picture on it, and if so is it the same way round? Edited March 23, 2011 by matt_hooks Quote Link to post Share on other sites
rob190364 2,594 Posted March 24, 2011 Author Report Share Posted March 24, 2011 A "12 volt" battery charger will output more than 12 volts. 14 volts is not unusual. It's unlikely to have done any damage to the battery (in fact, there is a method of reconditioning batteries that involves using a much higher rated battery/charger) The most likely thing is the charger is fnorked. The alternative is that the polarity is wrong. Does the car charger have any indication of polarity? The image you put up has the polarity as + on the centre pin, and - on the outside (you can see the little diagram, dot with a line coming from it to a + sign, and the outside ring with a - sign near it. Does the car charger have a similar picture on it, and if so is it the same way round? Thanks for this, I don't think it does to be honest, I'll double check though. Quote Link to post Share on other sites
matt_hooks 188 Posted March 24, 2011 Report Share Posted March 24, 2011 If it doesn't have marking on it, does the battery or lamp have any kind of indication on it of polarity? If that doesn't either, then find someone with a multimeter who can test the polarity of the in car charger. It does sound like the sort of thing that is caused by the wrong polarity, though why one manufacturer would use different polarities is a mystery. Quote Link to post Share on other sites
fox digger 1,086 Posted March 24, 2011 Report Share Posted March 24, 2011 this charger should charge it in theory mate, if you take off the lid ott the batt box you will see the two terminals on the top of the batt, id personally put on two spade connectors and two short pieces of cable and attact to the poles of the battery and leave it out through tho port where the charger goes, i.e take that out first, so you left with two short wires with spade connectors hanging out of the back of the lamp, then go down to halfords or someplace like that and ask them for the lowest ampage 12volt batt carger they have, the slower the charger the longer the batt will last(lifetime). hope this helps mate, or stay chargin it off the cigarette plug!!! atb. Quote Link to post Share on other sites
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