Topic: 9V li-ion batteries

[jerryfreak]

interesting, ive never seen these before. are cheap (cheaper than good nimh 9Vs) and have pretty high discharge currents

good data here

https://www.youtube.com/watch?v=9A06SPUF8i8

[relefunt]

I have been using the EBL batteries for some time and they work great. The price (22 USD for four, including a charger) is pretty good too:



https://www.amazon.com/EBL-Lithium-Battery-Rechargeable-Batteries/dp/B078HP76PG/ref=sr_1_4?keywords=EBL+9v&qid=1578437157&s=electronics&sr=1-4

[jerryfreak]

just got them.. they weigh like nothing

[perks]

Not compatible with a 4 9V Nbox? I know I need to be careful when ordering the PowerEx's to ensure I'm getting the 9.6V version instead of the 9V version. The 9V rechargeable batteries wont power the Nbox the way a 9V Duracell copper top would.

[jerryfreak]

Not compatible with a 4 9V Nbox? I know I need to be careful when ordering the PowerEx's to ensure I'm getting the 9.6V version instead of the 9V version. The 9V rechargeable batteries wont power the Nbox the way a 9V Duracell copper top would.

not sure, nick is pretty secretive about the operating voltage of the nbox, but all of the rechargables (particularly the eight-cell 9.6V NiMHs) should have plenty of voltage as 9V alkaline in normal use go down on a relatively constant slope to 6.0V

depending on type, most rechargables have a flatter curve between 7.5 and 10V

more than you ever wanted to know (thanks to justme for turning us on to this site)
https://lygte-info.dk/review/batteries9V/Common9VIndividualTest%20UK.html

[tim in jersey]

I'd suggest these for use w/ the N-Box (any flavor):

https://www.amazon.com/Powerex-MH-96V230-230mAh-Rechargeable-Battery/dp/B00LT0LS92/ref=sr_1_8?keywords=powerex+9.6v&qid=1578599690&sr=8-8

Tried and true. Between Nicky, klitz, Ed Tyre, Chomps and myself we've made hundreds of recordings using these batteries in the N-Box...

[perks]

I'd suggest these for use w/ the N-Box (any flavor):

https://www.amazon.com/Powerex-MH-96V230-230mAh-Rechargeable-Battery/dp/B00LT0LS92/ref=sr_1_8?keywords=powerex+9.6v&qid=1578599690&sr=8-8

Tried and true. Between Nicky, klitz, Ed Tyre, Chomps and myself we've made hundreds of recordings using these batteries in the N-Box...

Yes those are what I've been using too but I see there are so many more rechargeable 9V options than there were just a few years ago yet none appear to have the 9.6V like the PowerEx/Immedion and I suspect would be useless in a Nbox.

[tim in jersey]

I'd suggest these for use w/ the N-Box (any flavor):

https://www.amazon.com/Powerex-MH-96V230-230mAh-Rechargeable-Battery/dp/B00LT0LS92/ref=sr_1_8?keywords=powerex+9.6v&qid=1578599690&sr=8-8

Tried and true. Between Nicky, klitz, Ed Tyre, Chomps and myself we've made hundreds of recordings using these batteries in the N-Box...

Yes those are what I've been using too but I see there are so many more rechargeable 9V options than there were just a few years ago yet none appear to have the 9.6V like the PowerEx/Immedion and I suspect would be useless in a Nbox.

From what I recall Craig T and Ed had nothing but headaches w/ the rechargeable 9v. It wasn't until the 9.6v came out that there was a viable nimh rechargeable option...

[Craig T]

Yes, the (much) older 9V NiMH wouldn't work in the 4x 9V powered NBox.  The 9.6V that Tim referenced worked fine in my original NBox and now my NBox-Platinum.

I'd suggest these for use w/ the N-Box (any flavor):

https://www.amazon.com/Powerex-MH-96V230-230mAh-Rechargeable-Battery/dp/B00LT0LS92/ref=sr_1_8?keywords=powerex+9.6v&qid=1578599690&sr=8-8

Tried and true. Between Nicky, klitz, Ed Tyre, Chomps and myself we've made hundreds of recordings using these batteries in the N-Box...

Yes those are what I've been using too but I see there are so many more rechargeable 9V options than there were just a few years ago yet none appear to have the 9.6V like the PowerEx/Immedion and I suspect would be useless in a Nbox.

From what I recall Craig T and Ed had nothing but headaches w/ the rechargeable 9v. It wasn't until the 9.6v came out that there was a viable nimh rechargeable option...

[dactylus]

Works like a champ in both of my nBox Platinums.


https://www.thomasdistributing.com/Maha-Precharged-9V-96V-230-mAh-Low-Discharge-NIMH-Rechargeable-Battery_p_2455.html

[Gutbucket]

I'd suggest these for use w/ the N-Box (any flavor):

https://www.amazon.com/Powerex-MH-96V230-230mAh-Rechargeable-Battery/dp/B00LT0LS92/ref=sr_1_8?keywords=powerex+9.6v&qid=1578599690&sr=8-8

Tried and true. Between Nicky, klitz, Ed Tyre, Chomps and myself we've made hundreds of recordings using these batteries in the N-Box...

Yes those are what I've been using too but I see there are so many more rechargeable 9V options than there were just a few years ago yet none appear to have the 9.6V like the PowerEx/Immedion and I suspect would be useless in a Nbox.

From what I recall Craig T and Ed had nothing but headaches w/ the rechargeable 9v. It wasn't until the 9.6v came out that there was a viable nimh rechargeable option...

Same experience here using DPAs with CA-UGLY and a 4ch CA-UGLY2.

When I had the custom 4ch version built (which still uses a single 9V battery to power twice the channel count) it was time to replace the aging 9.6V Maha's I'd been using in the 2ch preamps anyway, so I tried a few different then newly available rechargeables which either failed rapidly or were associated with distortion of very low frequency content.  Granted this was early in the availability of alternatives and I suspect one or more I tried were not up to spec.  I wondered if it were voltage or current availability which was the limiting factor, but going back to using a new set of 9.6V Maha/PowerEx/Immedions eliminated the problem so I've stuck with them since.

Curious about lithiums, but wish they had a higher voltage option. Their light weight and high capacity are welcome if not really necessary for my uses.

[Gutbucket]

Anyone have insight into the possible metal-detection differences between lithium/NiMH/alkaline/other-chemisty "9V" batteries?

[jerryfreak]

Anyone have insight into the possible metal-detection differences between lithium/NiMH/alkaline/other-chemisty "9V" batteries?

i dont think any of the electrode materials are metallic. not all 9Vs have metal cases however. were still talking a very small amount of metal, venues cant have their magnetometers set sensitive enough to pick up every belt buckle and zipper

[Gutbucket]

^ Competent venue security anyway.  Recalling a Live Oak FL fest (a Wanee I think) where they were wanding everyone passing through the gate, which to my knowledge had never been done there prior.  The wands were set to such a ridiculously high sensitivity that two small stainless-steel cap-nuts I'd super-glued to a pair of foam earplugs set them off and I'd have to dig them out of my pocket each time I passed through the gate.  Even stuff like large rivets on folks jeans were beeping.  Pretty annoying.  Don't mind that it was an open taping fest and no one looked much beyond the zipper of gear bags on day one, and not in them at all day from two onward. 

Why the cap nuts? Exposed to loud low frequency content all day, I found I was bothered and fatigued by an annoying low frequency resonance I was able to attenuate by holding a I finger to the outside of each plug and lightly compressing them.  The addition of mass to the outside of the plug worked similarly, forming a constrained-layer-damping arrangement.  And it kinda looked like Frankenstein bolts, which was fun.

Note that some 9V batteries with plastic external cases contain stacks of internal cells with metal cases.  As you mention that's not much metal, but could be significant in combination with the metallic parts of the preamp itself.

[kleiner Rainer]

Hi all,

I have used rechargeable LiIon 9V blocks for multimeters for years without problems. First some technical points: a 9V alkaline block consists of 6 individual cells. The expected voltage range from non rechargeable cells is 9.6V no-load when fresh (1.6V per cell) to 6V when empty. A good circuit designer keeps that in mind together with the fact that there are batteries out with rather high internal resistance due to many batteries being built with pressure contacts between cells:

https://lygte-info.dk/info/BatteryDisassembly9VAlkaline%20UK.html

A rechaegeable LiIon 9V block is built with two LiIon cells in series, together with a protection circuit:

https://lygte-info.dk/info/BatteryDisassembly9VLiIon%20UK.html

Considering the voltage range of LiIon, we get 8.4V when fully charged to 6V when empty. The advantage is of course the lower internal resistance compared to primary cells. This becomes important when the load contains a dc/dc step-up converter (eg. for phantom power), because these tend to act as a constant input power load with a given output load. That means it tries to draw a higher current whenever the input voltage drops. To sum up the consequence: a battery with a higher internal resistance may seem empty much quicker than a battery with nominally lower capacity but lower internal resistance.

Here are tests of different 9V batteries:

https://lygte-info.dk/review/batteries9V/Common9VIndividualTest%20UK.html

https://lygte-info.dk/review/batteries9V/Common9Vcomparator.php

The comparator feature is especially nice. If you know the current consumption and undervoltage limit of your device this makes selection of the best battery easy.


Greetings,

Rainer