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Rechargeable 9v? Anyone use them are they good enough for preamp

Discussion in 'Pickups & Electronics [BG]' started by Gjbl, Dec 26, 2013.

  1. Gjbl

    Gjbl

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    Long title,

    I have been with passive only basses for 4 years now. I remember the great sound a fresh 9v would bring but it would only last a matter of days..:(.

    I take the care of my instruments very seriously right now because I'm working on several recordings. I heard somewhere that a recharged battery is not as good as a brand new 9v for the preamp of an active bass
    Thoughts ?...

    FYI it's for a stingray5
  2. Jazz Ad

    Jazz Ad Mi la ré sol Gold Supporting Member

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    Batteries last a very long time in basses, typically 6 months to a year.
    Rechargeable batteries can only keep their charge for a few weeks so that's how often you will have to change them.
    They're not good for this type of use.
  3. georgestrings

    georgestrings Supporting Member

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    Agreed - also, a typical 9v alkaline will start out at around 9.5vdc, whereas most rechargeables max out at 8.4vdc...


    - georgestrings
  4. georgestrings

    georgestrings Supporting Member

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    I have a difficult time believing this - did you leave it plugged in overnight???


    - georgestrings
  5. line6man

    line6man

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    Yeah, I'm not buying it, either. Active components draw so little current from the battery that it's like having a glass of water from a water tower. You're not going to run dry any time soon.
  6. Sav'nBass

    Sav'nBass Supporting Member

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    No they aren't. Alkaline batteries are the lowest you should go. Even standard batteries will not be as efficient in a preamp. even if you leave a fresh alkaline battery plugged in it will last a while.
  7. Gjbl

    Gjbl

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    They were Walgreens cheapo batteries

    Hell 6 months a recharge I can live with that... Anyone recommend a brand or supplier ... Maybe a few of us could pull together on a wholesale deal..
  8. Gjbl

    Gjbl

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    Thank you so much for all the input
  9. bassbenj

    bassbenj

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    And one final thing. If you want top of the line battery performance in an active bass, I'd highly recommend the High performance lithium NON-RECHARGEABLE 9 volt batteries. They cost about $8-$9 each but have shelf life for YEARS and will last about 9 times longer than standard alcaline batteries in use.

    The initial cost if a bit stiff and that induces some resistance, but so long as you don't leave them on the added life makes the total cost come out about the same. However, I also use them in my metronome and my MP3 player. They work great, but if you forget and leave them on for a couple days the batteries still end up dead. So being dizzy can cost you some money.

    As for rechargeables, the guys are right. Bad idea.
  10. walterw

    walterw Supportive Fender Gold Supporting Member

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    not recharge, replace.

    no need to pool our money, any common alkaline 9V will do.

    (be sure they are alkaline, the ones that just say "heavy duty" have a fraction of the staying power and are basically worthless.)
  11. Gjbl

    Gjbl

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    I must have terrible unplug sanitation as well I'm glad to hear this input... Just got an idea though ... Would it be possible to rewire an active bass so that the power comes from your instrument cable with some kind of phantom power without effecting the voicing or tone of the instrument at all?

    These forums are great I wish I would have utilized this resource years ago thanks for all the informative responses.
  12. walterw

    walterw Supportive Fender Gold Supporting Member

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    yes, there are a couple of different system out there for that:

    http://dcvoltage.net/p3/kits

    http://www.emgpickups.com/accessories/parts/power-supplies/es-9.html

    i don't think they're needed though, since a simple alkaline 9V will last a year, and will start to sound a little weak way before it stops working, giving you plenty of notice that you need to change it.
  13. Gjbl

    Gjbl

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    Thanks Heisenberg I think I'm gonna get the meg pedal and keep it in my case just in case...
  14. Gjbl

    Gjbl

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    Can you tell if that meg has a power cable on its side looks like it.
  15. Rob22315

    Rob22315

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    Yes, its easy to do and works very well. I haven't used a 9v battery in any of my three active basses in over three years. The mods to the bass are simple and easily reversible. I built a cheap breakout box that let's me apply power from a wallwart through a stereo instrument cable into the onboard preamp. Danelectro makes a very quiet 9v wallwart for cheap that has served me well. I also found a decent 18V wall wart that will work on 2 of the 3 basses I currently own.

    I am happy to post details and photos here if you're interested and there are a number of threads here on TB about it as well. Here's one:

    http://www.talkbass.com/forum/f38/tired-buying-9-volt-batteries-719302/

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