hitfreshairagain Posted February 22, 2009 Report Share Posted February 22, 2009 Hi all,being a newbie i am still getting my gear together on a monthly basis and today my dad came in with a present for me.lol A battery for my rotary but before i use it i do have the option to change it for another type if need be.It is a maplins 12v 12amp hour maintainece free sealed lead acid battery(maplins own make)is this ok or would i be better to change it how long will 12 amp hours last. Thanks for your help Lee Quote Link to comment Share on other sites More sharing options...
Shabbyshot Posted February 22, 2009 Report Share Posted February 22, 2009 I guess it would depend on what magnet you have as some will draw more then others. A 12ah bat should last you some time a 17/20 will prob do you all day. You should also consider getting a speed controler as you can adjust the speed as you see fit. You can get one for about £25. Hope this is of some help. SS Quote Link to comment Share on other sites More sharing options...
kennyboy30 Posted February 22, 2009 Report Share Posted February 22, 2009 :yp: hi mate the battery you have is ok for the magnet i use 12v 17 amp and mine lasts at least 7 to 8 hours none stop i think it works out about 2 amps to the hour discharge Quote Link to comment Share on other sites More sharing options...
webber Posted February 22, 2009 Report Share Posted February 22, 2009 The battery that you have will do, but 17ah would be better. I sell Yuasa batteries which are the best. If you decide to change, and would like a price, please PM me. webber Quote Link to comment Share on other sites More sharing options...
magman Posted February 22, 2009 Report Share Posted February 22, 2009 Most magnets come with 12v 7ah which lasts a good 5-6 hours as for all this 17ah why would you want to carry the extra weight :yp: keep a spare in the motor they will last you all day if need be Quote Link to comment Share on other sites More sharing options...
magman Posted February 22, 2009 Report Share Posted February 22, 2009 The battery that you have will do, but 17ah would be better.I sell Yuasa batteries which are the best. If you decide to change, and would like a price, please PM me. webber Spoken in a true salesmen voice :yp: Quote Link to comment Share on other sites More sharing options...
webber Posted February 22, 2009 Report Share Posted February 22, 2009 Magman makes a fair point. However the efficiency of the battery reduces significantly in cold or freezing conditions, thus reducing the number of hours. I certainly wouldn't want to carry anything bigger than 17ah. webber Quote Link to comment Share on other sites More sharing options...
Mec 9000 Posted February 22, 2009 Report Share Posted February 22, 2009 17ah golf cart batteries which can no longer go the full distance of 18 holes on the golf course will last all day. Most golfers discard these batteries as useless so why not ask them for their old batteries, I do, and use them for various things. I always carry two in the Landy just in case and have not yet needed to use the second one. i have wired the vehicle so that battery charges while driving. Quote Link to comment Share on other sites More sharing options...
hitfreshairagain Posted February 22, 2009 Author Report Share Posted February 22, 2009 (edited) thanks guys some real food for thought there.im now thinking i may need the 17 ah one but the weight is definatley a factor and maybe forced into this one. .Regarding the charging is it best to run them right down before charging also do i need a special charger to charge it,if i use a normal car charger can you over do it and knacker the battery.(how do i know its charged)Sorry bout the dopy question but the only thing ive ever done with cars is put petrol in it. Thanks again Lee Edited February 22, 2009 by hitfreshairagain Quote Link to comment Share on other sites More sharing options...
henry d Posted February 22, 2009 Report Share Posted February 22, 2009 You`ll be fine unless you are using a really old/heavy amperage unit or using it for 8-10 hrs plus, my 17ah will work with my magnet for 2 winter days or 1 & 1/2 summer ones. Quote Link to comment Share on other sites More sharing options...
webber Posted February 23, 2009 Report Share Posted February 23, 2009 Spoken in a true salesmen voice Magman Try to remember that you are dealing with a man who has sold glass to Pilkingtons! Admitedly, they were two rather small pieces, and they were fastened to some machinery that I had built, but there you go. webber Quote Link to comment Share on other sites More sharing options...
webber Posted February 23, 2009 Report Share Posted February 23, 2009 thanks guys some real food for thought there.im now thinking i may need the 17 ah one but the weight is definatley a factor and maybe forced into this one. .Regarding the charging is it best to run them right down before charging also do i need a special charger to charge it,if i use a normal car charger can you over do it and knacker the battery.(how do i know its charged)Sorry bout the dopy question but the only thing ive ever done with cars is put petrol in it.Thanks again Lee DO NOT fully discharge lead acid batteries, this will cause problems. Recharge your battery as soon as you can after shooting, and then charge again before you go shooting again. The majority of car battery chargers are quite crude, and ideally should not be used on the type of batteries under discussion. Ideally a 2 stage charge should be used. I also sell the correct chargers. If you are interested please PM me. webber Quote Link to comment Share on other sites More sharing options...
Agent36 Posted February 24, 2009 Report Share Posted February 24, 2009 (edited) Hi Hitfreshairagain, The 12Ah is the capacity of the battery. Like the size of your cars fuel tank. As long as its 12volt is does not matter what Ah you have. The larger the Ah the longer the battery will last and the heavier it will be. When choosing a battery you should compare the weight against how long you want it to last for. If you want to work out roughly how long your battery will last on your magnet do the following. 1) Measure the current being drawn by you motor using a multimeter.( A typical car wiper motor draws about 1.5 amps depending on load). Remember to put the arms and decoys on. 2) Divide the 12Ah by the motor current, measured in step one. 12Ah / 1.5A = 8 hours If your interested Ah stands for Amps per Hour, this how many amps the battery can supply at 12volts for one hour. I hope this helps, regards Agent. Edited February 24, 2009 by Agent36 Quote Link to comment Share on other sites More sharing options...
hitfreshairagain Posted February 24, 2009 Author Report Share Posted February 24, 2009 Thank you very much agent 36 Quote Link to comment Share on other sites More sharing options...
danccooke Posted February 28, 2009 Report Share Posted February 28, 2009 anyone for my old caravan 120Ah battery, Not too heavy Quote Link to comment Share on other sites More sharing options...
chrispti Posted February 28, 2009 Report Share Posted February 28, 2009 I use a car battery, lasts a good 4 days (8-9 hours per day) before it needs a charge Quote Link to comment Share on other sites More sharing options...
adymorris Posted March 4, 2009 Report Share Posted March 4, 2009 17ah golf cart batteries which can no longer go the full distance of 18 holes on the golf course will last all day. Most golfers discard these batteries as useless so why not ask them for their old batteries, I do, and use them for various things.I always carry two in the Landy just in case and have not yet needed to use the second one. i have wired the vehicle so that battery charges while driving. I got a 6 a couple of years ago for £3 from a golf cart servicing center - best £18 i ever spent all 6 last all day Quote Link to comment Share on other sites More sharing options...
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