Tomk282 Posted April 5, 2015 Report Share Posted April 5, 2015 Afternoon Gents! I was curious about running my magnet and 2 flappers off the same battery, i have enough cable to run between them and will save me carrying separate ones about and remembering to charge them all. What sort of size do you think id need to achieve 5 hours run time with the 3 machines running and 10M of cable to each? Flappers would be on timers so wont be going all the time. Cheers -TK Quote Link to comment Share on other sites More sharing options...
steve_b_wales Posted April 5, 2015 Report Share Posted April 5, 2015 A 12v/10 amp h may be suitable. Quote Link to comment Share on other sites More sharing options...
Cosd Posted April 5, 2015 Report Share Posted April 5, 2015 Id say about 15ah Unless you have a Pinewood magnet. Quote Link to comment Share on other sites More sharing options...
Tomk282 Posted April 5, 2015 Author Report Share Posted April 5, 2015 (edited) Id say about 15ah Unless you have a Pinewood magnet. No the magnet came from A1, is 15AH going to be enough? Also if i decide to just ran the magnet will it damage it having a bigger battery? Or is it only the voltage that will affect that? Edited April 5, 2015 by Tomk282 Quote Link to comment Share on other sites More sharing options...
Cosd Posted April 5, 2015 Report Share Posted April 5, 2015 Maybe Oscar can tell you what the current draw is on their magnets. Run of the mill magnets will use between 2 to 3 amps per hour. So if it's a 2amp draw and you use a 10ah battery you will get 5 hours. As long as its 12v magnet will be fine. In simple terms, the amps is what determines how long it will last. 15ah will last 50% longer than 10ah battery. Quote Link to comment Share on other sites More sharing options...
deny essex Posted April 5, 2015 Report Share Posted April 5, 2015 The length of your leads and their handling capacity could possibly make for a reduction in power to the items running off the battery, do not use too thin a lead to each. Quote Link to comment Share on other sites More sharing options...
oliver90owner Posted April 5, 2015 Report Share Posted April 5, 2015 (edited) What battery tech? Do you want to do this regularly? Given an adequate conductor cross section, that should not make any difference to the running time. If too high a resistance (too small area) the result would be reduced speed, effectively less current, so longer battery run time, but the kit may well slow so much as to be effectively exhausted! I would go with 15Ah for lead/acid. That would likely be a minimum. If I wanted good life from the battery I would go bigger. Best to measure the current draw from each and not guess. Also remember that the effective capacity of a battery goes down as the current goes up. I hate exhausting lead acid batteries at greater than C/10. Not good for them. Some may be rated at only C/20 discharge. Edited April 5, 2015 by oliver90owner Quote Link to comment Share on other sites More sharing options...
Tomk282 Posted April 5, 2015 Author Report Share Posted April 5, 2015 Cheers for the help oliver! Abit confusing but i think i got the jist of it aha. Quote Link to comment Share on other sites More sharing options...
foxy bingo Posted April 5, 2015 Report Share Posted April 5, 2015 just buy the biggest available job done Quote Link to comment Share on other sites More sharing options...
steve_b_wales Posted April 5, 2015 Report Share Posted April 5, 2015 When out lamping, I used to use a 12v /17amp battery. It lasted for many hours before needing a recharge. It should be ideal for your set up. Quote Link to comment Share on other sites More sharing options...
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