Topic: Recharable 9 volts in a MMA6000

[JD]

The MMA6000 is the only piece of gear that I do not have a rechargeable power source for. I am sending too many alkaline batteries to the landfill which is unacceptable.

What rechargeable battery is everyone using to power this pre?

I would like to stick with an internal battery and for most shows would need about 4 hours of power.

Thanks,


Jamie

[dunebug81]

I have yet to find a good rechargable 9v for my mma6000.  the one i did have didn't last very long and never seemed to put out enough power so one channel was always lower then the other.

[JD]

I have yet to find a good rechargable 9v for my mma6000.  the one i did have didn't last very long and never seemed to put out enough power so one channel was always lower then the other.

That's what I was afraid of. Most rechargeable 9 volts seem to only put out about 8.4 to 8.6 volts.

Right now I'm leaning towards trying this one out;

http://www.nimhbattery.com/mh-96v230.htm

If I recall correctly, a standard alkaline 9volt is around 550 mah and runs the MMA6000 about 18 hrs? So in theory this battery should give about a 7 to 8 hour runtime.

[dunebug81]

Well that sounds like it would work. 

http://www.batteriesandbutter.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=PC16049VC&Category_Code=dupro

That is what I use...I think I pay $1.15 or so from the shop I buy my blank MDs at here in Atlanta.  I change them out about once a month because I use it quite often.  I always wait till the green turns to red before swapping it out to reduce the amount of 9vs I use.  i've also found that cheap no-name 9v cells are crap too...don't buy walgreens brand 9v!

If you get those rechargeable ones post your experience with them.   

[edtyre]

http://thomasdistributing.com/shop/-maha-9v-300-mah-nimh-rechargeable-battery-p-503.html?SP_id=&osCsid=cb921d584b96c4d4881badfc87261855

Used these in my mma6000 until i sold it. I now use them in my nbox.

[Lil Kim Jong-Il]

Used these in my mma6000 until i sold it.

How much time did you get on a full charge?

[WiFiJeff]

Used these in my mma6000 until i sold it.

How much time did you get on a full charge?

More important, how much time did you get once the red light came on?  I get about 20 hours or more from energizer 9Vs, but around 3 hours once the red light comes on.  This means I'm okay even if I find that the red light is blinking at intermission.  I've never had a situation where it died before I could change it out at leisure.  I think the NiMH cells die faster once they trigger the red light, so I haven't used them, if not they may be interesting.

Jeff

[JD]

I'm going to order a pair of the 230 mah batteries I linked to above. I'll post back some run times after I do some testing.

I decided to go with the 230 mah over the 300 mah because of the voltage difference. The 230's are 9.6v and the 300 are 8.4v.

I figured the LED on the mma6000 must change from green to red as the pre senses a drop in voltage to particular level. Hopefully the 230mah batteries will run in the same manner as an alkaline do, just not as long.

[SClassical]

I have a few of these, which I haven't used (still sealed)....I bought a few but only used 1 because it lasted much longer than I thought. If you're interested in getting one cheap PM me.

[dactylus]

http://thomasdistributing.com/shop/-maha-9v-300-mah-nimh-rechargeable-battery-p-503.html?SP_id=&osCsid=cb921d584b96c4d4881badfc87261855

Used these in my mma6000 until i sold it. I now use them in my nbox.

Looks good to me - thanks for the tip!!

+T   

David

[Crumbo]

http://thomasdistributing.com/shop/-maha-9v-300-mah-nimh-rechargeable-battery-p-503.html?SP_id=&osCsid=cb921d584b96c4d4881badfc87261855

Used these in my mma6000 until i sold it. I now use them in my nbox.

how much time do you get with the nbox?

+T for the info )8

[edtyre]

http://thomasdistributing.com/shop/-maha-9v-300-mah-nimh-rechargeable-battery-p-503.html?SP_id=&osCsid=cb921d584b96c4d4881badfc87261855

Used these in my mma6000 until i sold it. I now use them in my nbox.

how much time do you get with the nbox?

+T for the info )8

Used 2 (every other show slot) of the batteries above in all 35 shows i recorded with my nbox
and used all 4 in only one show of the 35 ( a 2 hour show) so they definitely work ok.

The "how long" part i don't know, cause i charged them after every show. I am going to do a test
this week to see exactly how long they will last. As soon as i have my results i'll post here.

[Todd R]

Just cross posting information I came across in another thread.  Apparently there is a new li-poly 9v battery available.  It is 500mah, which is about the same capacity as a 9v alkaline battery, but operates at a nominal 8.4v.

More info here:
http://taperssection.com/index.php/topic,56579.msg1196944.html#msg1196944

[WiFiJeff]

Just cross posting information I came across in another thread.  Apparently there is a new li-poly 9v battery available.  It is 500mah, which is about the same capacity as a 9v alkaline battery, but operates at a nominal 8.4v.

More info here:
http://taperssection.com/index.php/topic,56579.msg1196944.html#msg1196944

If you want to use use these, be sure to test first.  I tried to gang four in series to run a DaviSound preamp, which is not high current draw, and they choked up.  If I briefly shorted the leads of the battery box they got it on, but I was not happy with this solution.  Regular 9Vs work like a charm with this battery box, also with a five-battery box (both built for me by Chris at Sound Professionals). 

Jeff

[Crumbo]

http://thomasdistributing.com/shop/-maha-9v-300-mah-nimh-rechargeable-battery-p-503.html?SP_id=&osCsid=cb921d584b96c4d4881badfc87261855

Used these in my mma6000 until i sold it. I now use them in my nbox.

how much time do you get with the nbox?

+T for the info )8

Used 2 (every other show slot) of the batteries above in all 35 shows i recorded with my nbox
and used all 4 in only one show of the 35 ( a 2 hour show) so they definitely work ok.

The "how long" part i don't know, cause i charged them after every show. I am going to do a test
this week to see exactly how long they will last. As soon as i have my results i'll post here.

excellent

thank you!