lamping_lad 8 Posted January 9, 2013 Report Share Posted January 9, 2013 (edited) Hi lads, I was wondering if anyone on here has ever made up their own lamping battery from old lithium batteries. I can get a lot of old laptop batteries from a buddy for free and I was thinking that I could join a few of them together so it would last a nights lamping. Would I be right in thinking if one battery failed that no current would flow? Can anyone think of any other problems? L_L EDIT: would it matter if there was a difference of let's say 1 V between the highest and lowest voltage battery? Edited January 9, 2013 by lamping_lad Quote Link to post
chris87 297 Posted January 9, 2013 Report Share Posted January 9, 2013 dont @v @ clue, but seems @ long shot to me. @tb with it... 1 Quote Link to post
Josh1996 14 Posted January 10, 2013 Report Share Posted January 10, 2013 Better off just buying a battery tbh with you mate much less hassle and effort and they aren't that expensive really. Quote Link to post
woz 260 Posted January 10, 2013 Report Share Posted January 10, 2013 Ok hear goes....li ion is dangerous if not treated with respect. All the batteries have to be from the sane manufacturer.....they discharge and recharge at different rates and will put an imbalance in the pack.BOOM!!!!! Each cell needs to be balance charged before making it into part of a pack... You will need a PCB board they are about £10. You will need to make a 14.4v pack....28. Laptop batteries will give you 14 amp hr... Get hold of a 16v laptop charger off flee bay.. The batteries don't like heat so be careful when soldering. ..solder banks of 4 to get the voltage and then join them up to get the ampage... This is as far as iv got and there's plenty more to learn about li ion.. they do blow up... Quote Link to post
woz 260 Posted January 10, 2013 Report Share Posted January 10, 2013 You'll make a 14 amp battery pack for around £30 Quote Link to post
keymac88 8 Posted January 10, 2013 Report Share Posted January 10, 2013 Ok hear goes....li ion is dangerous if not treated with respect. All the batteries have to be from the sane manufacturer.....they discharge and recharge at different rates and will put an imbalance in the pack.BOOM!!!!! Each cell needs to be balance charged before making it into part of a pack... You will need a PCB board they are about £10. You will need to make a 14.4v pack....28. Laptop batteries will give you 14 amp hr... Get hold of a 16v laptop charger off flee bay.. The batteries don't like heat so be careful when soldering. ..solder banks of 4 to get the voltage and then join them up to get the ampage... This is as far as iv got and there's plenty more to learn about li ion.. they do blow up... Haha I'd sooner take a car battery with me than do all that Quote Link to post
paulus 26 Posted January 10, 2013 Report Share Posted January 10, 2013 You'll make a 14 amp battery pack for around £30 and tens of thousands of pounds to repair the damage when it sets on fire or blows up :laugh: Quote Link to post
mushroom 13,205 Posted January 10, 2013 Report Share Posted January 10, 2013 You'll make a 14 amp battery pack for around £30 and tens of thousands of pounds to repair the damage when it sets on fire or blows up :laugh: Plus a little trip to the burns unit, then off to the beauty therapist to get your eyebrows drawn on :laugh: Quote Link to post
paulus 26 Posted January 10, 2013 Report Share Posted January 10, 2013 You'll make a 14 amp battery pack for around £30 and tens of thousands of pounds to repair the damage when it sets on fire or blows up :laugh: Plus a little trip to the burns unit, then off to the beauty therapist to get your eyebrows drawn on :laugh: mine was only £50 new :laugh: fook creating a bomb to save £20 Quote Link to post
Josh1996 14 Posted January 10, 2013 Report Share Posted January 10, 2013 You'll make a 14 amp battery pack for around £30 and tens of thousands of pounds to repair the damage when it sets on fire or blows up :laugh: Plus a little trip to the burns unit, then off to the beauty therapist to get your eyebrows drawn on :laugh: mine was only £50 new :laugh: fook creating a bomb to save £20 Exactly man just buy a motorbike battery or something or even a 2nd hand lithium one off of the forums on here and it will be so much easier for you. Quote Link to post
lamping_lad 8 Posted January 11, 2013 Author Report Share Posted January 11, 2013 (edited) Ok hear goes....li ion is dangerous if not treated with respect. All the batteries have to be from the sane manufacturer.....they discharge and recharge at different rates and will put an imbalance in the pack.BOOM!!!!! Each cell needs to be balance charged before making it into part of a pack... You will need a PCB board they are about £10. You will need to make a 14.4v pack....28. Laptop batteries will give you 14 amp hr... Get hold of a 16v laptop charger off flee bay.. The batteries don't like heat so be careful when soldering. ..solder banks of 4 to get the voltage and then join them up to get the ampage... This is as far as iv got and there's plenty more to learn about li ion.. they do blow up... Thanks for the helpful reply unlike all of the others. My friend is bound to have lots of PCB boards. Would 10.8 V batteries do, most of the HP laptops take these? The part above in italics, do you mean that 28 batteries will give 14 Ahr? I'm not arguing with you now or anything as you clearly know more about electronics than I but would a 16 V charger not overcharge a 14.4 battery and make shit of them? I'm going to have to get my leaving cert physics book out again to brush up. Best of luck Edited January 11, 2013 by lamping_lad Quote Link to post
woz 260 Posted January 11, 2013 Report Share Posted January 11, 2013 Ok hear goes....li ion is dangerous if not treated with respect. All the batteries have to be from the sane manufacturer.....they discharge and recharge at different rates and will put an imbalance in the pack.BOOM!!!!! Each cell needs to be balance charged before making it into part of a pack... You will need a PCB board they are about £10. You will need to make a 14.4v pack....28. Laptop batteries will give you 14 amp hr... Get hold of a 16v laptop charger off flee bay.. The batteries don't like heat so be careful when soldering. ..solder banks of 4 to get the voltage and then join them up to get the ampage... This is as far as iv got and there's plenty more to learn about li ion.. they do blow up... Thanks for the helpful reply unlike all of the others. My friend is bound to have lots of PCB boards. Would 10.8 V batteries do, most of the HP laptops take these? The part above in italics, do you mean that 28 batteries will give 14 Ahr? I'm not arguing with you now or anything as you clearly know more about electronics than I but would a 16 V charger not overcharge a 14.4 battery and make shit of them? I'm going to have to get my leaving cert physics book out again to brush up. Best of luck Hi...don't worry about the negative replies its beyond there mental capacities to understand the thread.so they have to add dumb comments... All laptops run on cr 1865's you will need to split the laptop battery and seperate the individual cells...when you've done this test the voltage on each cell...if they are under 2.75 v they are knackered..fully charged they will be 3.6v .....3.6v x 4 =14.4 volts....make up 7 sets of 4 batteries and join them together then you get 14amp pack:.........each cr1865 is 2000 milli amp or 2 amp......the PCB (protection circuit board) stop over charge and will disconnect when the pack voltage gets to low..have a look on YouTube at electric bike battery hack...they make a pair of 36v packs but the principles are the same for you lamp pack......also look on candle power forum this forum will give you tons of info on li ion batteries there safe use and peramitters....you need more knowledge than you have at the moment but its easy enough....... Quote Link to post
mushroom 13,205 Posted January 11, 2013 Report Share Posted January 11, 2013 Ok hear goes....li ion is dangerous if not treated with respect. All the batteries have to be from the sane manufacturer.....they discharge and recharge at different rates and will put an imbalance in the pack.BOOM!!!!! Each cell needs to be balance charged before making it into part of a pack... You will need a PCB board they are about £10. You will need to make a 14.4v pack....28. Laptop batteries will give you 14 amp hr... Get hold of a 16v laptop charger off flee bay.. The batteries don't like heat so be careful when soldering. ..solder banks of 4 to get the voltage and then join them up to get the ampage... This is as far as iv got and there's plenty more to learn about li ion.. they do blow up... Thanks for the helpful reply unlike all of the others. My friend is bound to have lots of PCB boards. Would 10.8 V batteries do, most of the HP laptops take these? The part above in italics, do you mean that 28 batteries will give 14 Ahr? I'm not arguing with you now or anything as you clearly know more about electronics than I but would a 16 V charger not overcharge a 14.4 battery and make shit of them? I'm going to have to get my leaving cert physics book out again to brush up. Best of luck Hi...don't worry about the negative replies its beyond there mental capacities to understand the thread.so they have to add dumb comments... All laptops run on cr 1865's you will need to split the laptop battery and seperate the individual cells...when you've done this test the voltage on each cell...if they are under 2.75 v they are knackered..fully charged they will be 3.6v .....3.6v x 4 =14.4 volts....make up 7 sets of 4 batteries and join them together then you get 14amp pack:.........each cr1865 is 2000 milli amp or 2 amp......the PCB (protection circuit board) stop over charge and will disconnect when the pack voltage gets to low..have a look on YouTube at electric bike battery hack...they make a pair of 36v packs but the principles are the same for you lamp pack......also look on candle power forum this forum will give you tons of info on li ion batteries there safe use and peramitters....you need more knowledge than you have at the moment but its easy enough....... OK Dumb comments???? 1, it is dangerous as you already said hence the advice not to bother. 2, connect the cells how?? series?? parallel?? one will work the other is a problem waiting to happen ie too much current!! 3, PCB is printed circuit board not protection 4, not all laptops run on on the type of cells you have mentioned, mine right now runs on a completely different set up than you have mentioned with a max ampage of 3.62Amps therefore each cell cannot be 2000mA unless I have a cell in my pack .38A smaller than the other? or a whole bunch of cells running at less than 2Amps Lamping lad I agree with Woz's last comment you defo need to learn more (no offence intended) messing with Li io is dangerous with little knowledge Quote Link to post
woz 260 Posted January 11, 2013 Report Share Posted January 11, 2013 Not all cr1850's are 2amp but most are....iv split over 100 laptop batteries and there all the same...split yours and have a look......PCB in this context is protection circuit board...when ordering that's what you ask for.to be fare I couldn't give two f***s what you think.I was just trying to help and pass some knowledge on...if your so wise why didn't you post something more informative on this thread ya dummy!!!!!! Quote Link to post
mushroom 13,205 Posted January 11, 2013 Report Share Posted January 11, 2013 Not all cr1850's are 2amp but most are....iv split over 100 laptop batteries and there all the same...split yours and have a look......PCB in this context is protection circuit board...when ordering that's what you ask for.to be fare I couldn't give two f***s what you think.I was just trying to help and pass some knowledge on...if your so wise why didn't you post something more informative on this thread ya dummy!!!!!! Likewise sweetpea Saying we gave negative comments etc when you give incomplete advice And the Acronym you are looking for is CPM/B (Circuit protection Module/board) when the poor lad blows his eyebrows away and part of his kitchen or melts every wire in his lamp guess you refund him Guess we live and learn Atb Shroom 1 Quote Link to post
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