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500mAh 9v batteries?!

post #1 of 29
6/17/06 at 7:58am
Thread Starter 
Hey.. for all us portable users I just saw this at thomas whilst looking for 9v rechargables.. I dont know if anyone else has posted this but im praying that these would work for the pint.. Check it out

http://www.thomas-distributing.com/i...le-battery.php
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post #2 of 29
6/17/06 at 1:26pm
Some people have had issues with those batteries, such as them catching on fire. You'd be safer to stick with regular rechargeables.
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post #3 of 29
6/17/06 at 6:01pm
Lithium polymer is definitely dangerous indeed. Too low or too high of a charge and make everything go wrong with them. They also need specialized chargers that are catered to lithium polymers and are able to accurately maintain them and prevent overcharging.
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post #4 of 29
6/17/06 at 8:29pm

Warning! Product QC Alert...

Please read my comments in a related thread, at this link:
Caveat Emptor - iPower 9V Lithium-Polymer rechargeable batteries
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post #5 of 29
6/17/06 at 9:58pm
Thread Starter 
Shucks, nice review on them romanee.. I was about to give em a shot but I didnt think they effectively could work in a pint / porta amp especially with the charging circuit thats in there.. Ill stick with a batch of nimh's for now, but will keep an eye out for new ones that might work a little better.
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post #6 of 29
6/17/06 at 10:15pm
Pah! don't give up .. use a REAL lipo =p

http://www.all-battery.com/index.asp...ROD&ProdID=508
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post #7 of 29
6/18/06 at 1:08am

...more options...

Yes there are other rechargeable Lithium-Polymer options -- though the point of the thread was originally 9V rechargeable Li-Po batteries to fit in portable amps.

Here are a couple of other powerhouse options, but they're big (compared to typical 9V batteries):

5400mAh Li-Po 11v pack $44.99

4000mAh $54.95

There is another 9V Li-Po rechargeable by Powerizer, at batteryspace.com, but it's charger charges only 1 at a time, and I'm not sure if I want to be a guinea pig on these.

Powerizer 9V Li-Poly rechargeable $8.95
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post #8 of 29
6/18/06 at 1:41pm
Couldn't you just use some surplus cell phone batteries and a DC/DC converter?
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post #9 of 29
6/19/06 at 5:46pm

500mAh vs 400mAh Li-Po 9V

Just discovered that the replacements I had received for 3 defective 400mAh iPower 9V Li-Poly batteries were more 400mAh and not the newer 500mAh!

4 new 500mAh are on the way, and Thomas Distributing says they work well and do not have the problems that the 400mAh had.

Also, the mfr. site notes their dimensions at the same width & depth as the Maha Powerex 230mAh 9V, and just .03inch longer. In theory they should fit wherever the Maha fits.

More to come.
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post #10 of 29
6/21/06 at 10:11pm
Quote:
Originally Posted by Romanee
Yes there are other rechargeable Lithium-Polymer options -- though the point of the thread was originally 9V rechargeable Li-Po batteries to fit in portable amps.

Here are a couple of other powerhouse options, but they're big (compared to typical 9V batteries):

5400mAh Li-Po 11v pack $44.99

4000mAh $54.95

There is another 9V Li-Po rechargeable by Powerizer, at batteryspace.com, but it's charger charges only 1 at a time, and I'm not sure if I want to be a guinea pig on these.

Powerizer 9V Li-Poly rechargeable $8.95
Romanee,
I promised to give the part number for the output-side adapter on that 5.4Ah battery. Ratshack 274-1532 "Coax-Style DC Power Plug" 4.0mm OD, 1.7mm ID, 22.8mm +/- 1.0mm barrel length. Since I don't know whether this is male or female, here's a picture.


For those that are wondering, there's 2 9V plugs because this is to fit one side of a HeadRoom MicroStack--one to the amp, the other to the dac. The stack requires two of these gizmos and two batteries--one for +9V, another for -9V.
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post #11 of 29
6/22/06 at 1:48am

Oy-Oy-Oy (or something)

Quote:
Originally Posted by SiBurning
Romanee,
I promised to give the part number for the output-side adapter on that 5.4Ah battery. Ratshack 274-1532 "Coax-Style DC Power Plug" 4.0mm OD, 1.7mm ID, 22.8mm +/- 1.0mm barrel length. Since I don't know whether this is male or female, here's a picture.


For those that are wondering, there's 2 9V plugs because this is to fit one side of a HeadRoom MicroStack--one to the amp, the other to the dac. The stack requires two of these gizmos and two batteries--one for +9V, another for -9V.
This I've gotta see -- This I have to see in action to under -- to believe -- to comprehend -- to figure out how the heck one can practically/realistically/painlessly make this all work. Whew.

...waiting with (a-)bated breath... (or was that baited breath... yuk). keep me posted (dblyuk)

Thanks, chum! (...get it?... "chum"... oh, well... minor groan...)
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post #12 of 29
6/22/06 at 2:05am
Went out yesterday with a pack of 8 AA batteries stuck in each of the side pockets of the headroom bag. It's this gizmo.

When I got home, both packs still measured over 10V. So... It works! It works!

The lithium packs have to wait. Those ratshack parts are so cheap, I broke two connectors just trying to get some decent wires attached.

Keep goading me (I could use the inspiration) and with any luck I'll have something more reliable than this cheesy prototype to show at the summer meet.

By the way, for "chum" dictionary.com has: Bait usually consisting of oily fish ground up and scattered on the water. Are you calling me fish bait?
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post #13 of 29
6/23/06 at 12:41am

500mAh Li-Po -- good news!

Quote:
Originally Posted by SiBurning
...By the way, for "chum" dictionary.com has: Bait usually consisting of oily fish ground up and scattered on the water. Are you calling me fish bait?
Nah... reference was to "baited breath". (yuk).

Just received six iPower 500mAh 9v Li-Po from Thomas Distributing -- and the good news is that, as Brent Thomas said, the 500mAh do not have the awful problems that the 400mAh iPowers had.

4 charged normally and perfectly, and last 2 are charging. I think these will probably be good. I'll test them tomorrow.
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post #14 of 29
6/23/06 at 4:02am

500mAh in MicroStack

The 500mAh iPower 9V Li-Po batteries do not fit into the Headroom MicroAmp or DAC with some minor mods. The main body of the battery just squeezes in, but there's a slightly extended lip around the top edge.

Mfr. specs sure don't help much. iPowerUS lists dimensions for these that closely match the Maha 9.6V (which do fit the MicroAmp/DAC), but obviously these must actually be larger than the Maha.

I filed off the extended top edges and just squeezed them in -- but you'll need a very strong, very long-nosed pliers and a strong grip to extract them. They certainly will not slide in and out.

I'll have to try sanding the sides down. The case is fairly soft plastic so it should not be too hard. Unfortunately, one side has a metal foil barcode-S/N label on it.

The obstacles in the case are the threaded channels for the knurled thumbscrews -- which channels protrude into the battery compartments. The sloping sides of the units also cause one corner to cut into the battery space.

It would be nice if the MicroStack, the SR-71 and the Hornet had just a bit more battery space to readily accommodate a greater variety of batteries without needing to resort to mutilating the batteries.

In any case, I managed to get the batteries into the Amp and DAC (and made sure I could extract them) and will test their longevity at work tomorrow.
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post #15 of 29
6/23/06 at 5:07am
Quote:
Originally Posted by SiBurning
Went out yesterday with a pack of 8 AA batteries stuck in each of the side pockets of the headroom bag....

...Keep goading me (I could use the inspiration) and with any luck I'll have something more reliable than this cheesy prototype to show at the summer meet.?
Man, that's some grizzly looking constructions. Don't walk through any security checkpoints widdat!
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