TrevorG Posted June 28, 2018 Share Posted June 28, 2018 I have a Spector NS5XL with two nine volt batteries. One, I assume, is powering the pickups, the other - the preamp. When my sound starts to degrade I have always changed both batteries but it's only just occurred to me I don't know if one battery still has more juice than the other. Do they wear out at the same time or am I changing one needlessly? Quote Link to comment Share on other sites More sharing options...
LewisK1975 Posted June 28, 2018 Share Posted June 28, 2018 I don't know the answer, but you could check that easily with a multi-meter. 1 Quote Link to comment Share on other sites More sharing options...
pineweasel Posted June 28, 2018 Share Posted June 28, 2018 I think your batteries are connected in series to provide 18v to both the active circuit and pickups, in which case they will run down at the same rate. 4 Quote Link to comment Share on other sites More sharing options...
geoffbyrne Posted June 28, 2018 Share Posted June 28, 2018 ^^^ This. G. Quote Link to comment Share on other sites More sharing options...
cattytown Posted June 29, 2018 Share Posted June 29, 2018 Pine weasel has it. paul. Quote Link to comment Share on other sites More sharing options...
John Cribbin Posted June 30, 2018 Share Posted June 30, 2018 Provided the're matching batteries of the same capacity... Quote Link to comment Share on other sites More sharing options...
Norris Posted July 1, 2018 Share Posted July 1, 2018 On my 80s Aria the batteries would definitely discharge at different rates. One would last for months and months, the other only about 6 weeks. A quick "tip of the tongue" test identified which was which, until I eventually wrapped a small piece of gaffa tape round the lead of the one that needed changing most frequently 1 Quote Link to comment Share on other sites More sharing options...
afterimage Posted July 1, 2018 Share Posted July 1, 2018 on my Deluxe Bass Fender. It's usually one never two at the same time Quote Link to comment Share on other sites More sharing options...
warwickhunt Posted July 1, 2018 Share Posted July 1, 2018 If one goes before the other it is down to battery quality not what they 'do' as both do the same job in series as opposed to them doing different jobs! 1 Quote Link to comment Share on other sites More sharing options...
afterimage Posted July 2, 2018 Share Posted July 2, 2018 Yes that's very true ,I used to see lots of car batteries on pallets they didn't pass health checks at JLR Quote Link to comment Share on other sites More sharing options...
nash Posted July 4, 2018 Share Posted July 4, 2018 Should be changing both batteries at the same time as well. Quote Link to comment Share on other sites More sharing options...
goingdownslow Posted July 6, 2018 Share Posted July 6, 2018 (edited) On my Warwick Thumb Bass with 18v active circuitry the batteries are wired in series but there is a centre tap to provide the pickups with 9v from one of the batteries so I would expect that one would run down quicker than the other. I last replaced the batteries in July 2015 so don't mind replacing both at the same time. Edited July 6, 2018 by goingdownslow Quote Link to comment Share on other sites More sharing options...
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