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[Debbie Dunkley]

Last time I asked for some suggestions on rechargeable batteries and chargers it was for AA and AAA. However, what are you guys using for 9v?

[Steve Oldridge]

Last time I asked for some suggestions on rechargeable batteries and chargers it was for AA and AAA. However, what are you guys using for 9v?

Deb, never used them myself, but have heard from others (including band mates) who have that they don't do real well on recharges. My guys moved back to standard energizers or copper tops for IEM (PSM200) use.

[Debbie Dunkley]

Deb, never used them myself, but have heard from others (including band mates) who have that they don't do real well on recharges. My guys moved back to standard energizers or copper tops for IEM (PSM200) use.

Thanks Steve... Do you know what the main issue seems to be?.... I have gotten into a habit of recharging my AAs every 2 normal length shows. That way I never get close to running out of power. and I keep to my own schedule so I never forget. So I have no problem charging often if that is the case or do they just not charge fully?
How long do your guys get out of standard 9 volts in iems?

[John Rutirasiri]

Thanks Steve... Do you know what the main issue seems to be?.... I have gotten into a habit of recharging my AAs every 2 normal length shows. That way I never get close to running out of power. and I keep to my own schedule so I never forget. So I have no problem charging often if that is the case or do they just not charge fully?
How long do your guys get out of standard 9 volts in iems?

The main issue I've encountered with NiMH rechargeable 9V's is that they do not seem to last past 2-3 hours -- "falls off the cliff" fast.  This may be that actual voltage tends to be 8.4V at full charge, or they just don't handle continuous current draw of a wireless mic very well.  Technology has moved on, so the current generation rechargeables may have overcome these issues.  (For things that have peak current draw such as camera flashes, rechargeables do very well.)

John R.

[brian maddox]

The main issue I've encountered with NiMH rechargeable 9V's is that they do not seem to last past 2-3 hours -- "falls off the cliff" fast.  This may be that actual voltage tends to be 8.4V at full charge, or they just don't handle continuous current draw of a wireless mic very well.  Technology has moved on, so the current generation rechargeables may have overcome these issues.  (For things that have peak current draw such as camera flashes, rechargeables do very well.)

John R.

Yeah, the NiMH 9V don't work well for audio use.  However, the Lithium-Polymer and Lithium-ion ones work VERY well.

For LiPos i use iPower.  They are expensive, but they last WAY longer than alkalines with no memory affect.  I've got about 8-10 of these that are about 3 years old and they're still going strong.  I've also had pretty good success with Tenergy Li-ion 9V.  These are much less expensive than the iPowers.  Haven't used them for as long as my iPowers, but they've held up well so far.  For both of these you'll need a charger designed to charge them.

i forget where i've purchased these, but a Google search should get you setup...

[Debbie Dunkley]

Yeah, the NiMH 9V don't work well for audio use.  However, the Lithium-Polymer and Lithium-ion ones work VERY well.

For LiPos i use iPower.  They are expensive, but they last WAY longer than alkalines with no memory affect.  I've got about 8-10 of these that are about 3 years old and they're still going strong.  I've also had pretty good success with Tenergy Li-ion 9V.  These are much less expensive than the iPowers.  Haven't used them for as long as my iPowers, but they've held up well so far.  For both of these you'll need a charger designed to charge them.

i forget where i've purchased these, but a Google search should get you setup...

Thanks Brian- I'm on it!

[Andrew Makinson]

Yeah, the NiMH 9V don't work well for audio use.  However, the Lithium-Polymer and Lithium-ion ones work VERY well.

For LiPos i use iPower.  They are expensive, but they last WAY longer than alkalines with no memory affect. 

I agree. 

We stopped using iPower in the Shure ULX-P because they won't grip the terminals well and they show low battery even though they last for hours.  Those are the things to watch out for.

[Ray Aberle]

Last time I asked for some suggestions on rechargeable batteries and chargers it was for AA and AAA. However, what are you guys using for 9v?

Depending on how mobile you really need to be... I found the Shure PS9US in their catalog; it's a 9-volt battery replacement power supply. So, takes wall power, and ends up with a 9V contact, that you can then install into your IEM bodyback in lieu of a battery- so you're wired down, but no battery concerns.

-Ray

[Debbie Dunkley]

Depending on how mobile you really need to be... I found the Shure PS9US in their catalog; it's a 9-volt battery replacement power supply. So, takes wall power, and ends up with a 9V contact, that you can then install into your IEM bodyback in lieu of a battery- so you're wired down, but no battery concerns.

-Ray

Thanks Ray. I have a number of  individual headphone amps and a 6 way rack mount version for wired options  - keys player/ drummer etc so  I wouldn't have need of something like this. Good idea for anyone needing to adapt any 9 volt unit to mains though...

[Rob Spence]

Depending on how mobile you really need to be... I found the Shure PS9US in their catalog; it's a 9-volt battery replacement power supply. So, takes wall power, and ends up with a 9V contact, that you can then install into your IEM bodyback in lieu of a battery- so you're wired down, but no battery concerns.

-Ray

I use these to get through a wall to a remote speaker or across a pathway I can't have wires on.


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