Greenbatteries.com - Responsible Renewable Energy: 03/22/2009 - Greenbatteries.com - Responsible Renewable Energy - batteries - information on rechargeable batteries and battery chargers

Hi Carlos,

Thanks for your email and your business. We have many customers that use our greenbatteries.com NiMH batteries for wireless mics and the issue with voltage is always a concern because the devices all have different specs and use power differently. "9 volt" NiMH rechargeable batteries are actually battery packs with multiple 1.2 cells inside and they come in three voltage configurations - 7.2, 8.4 and 9.6

Generally a wireless mic can be designed to use 9 volts exactly (alkaline non-rechargeable batteries) or rechargeable batteries, or both but it goes through the non-rechargeable alkaline battery pretty quickly. When the mic starts to no longer function properly it has reached the "voltage cutoff" and will either work less reliably or simply cease to function at all. The specific cutoff voltage is normally not a detail that is available to the consumer, so we must just guess what the voltage cutoff is for your mics. A good rule of thumb is if they do not work for as long as you like with a 8.4 volt 230 mAh NiMH battery then it is very likely that they will work longer with a higher voltage and/or higher mAh capacity NiMH battery - like the Maha 9.6 volt unit.

Keep in mind that all of our products are fully guaranteed to provide you with satisfactory service so I would definitely try the 9.6 Maha , especially if you already have one of their smart 9 volt chargers - it will charge any NiMH "9 volt" battery regardless of the voltage.

The size is another issue. If your mic battery compartments are a bit on the tight side we can assume that they were really designed for non-rechargeable batteries because rechargeable batteries are not normally the same size as their non-rechargeable cousins. Indeed, batteries are not really in standard sizes it is really more of a size range. They also change size slightly (get bigger) when fully charged. So to get you the best battery to fit your devices we must know the exact size of battery that will fit well in MM because the size differences are typically in fractions of a MM.

I can measure the Maha battery and let you know if it will fit after I compare it to a Duracell or Energizer alkaline battery. The Maha NiMH 9.6 volt battery does not have a shrink wrap sleeve so if it does not fit out of the box we cannot alter it to make it fit better.

Hope that helps.

Sincerely,

Curtis

Responsible Energy Corporation
Curtis Randolph - CEO
3170 Eugene Way
Fallon, NV 89406
phone 800-790-7866 x3
fax 815-301-3958
cell 775-722-9901
www.greenbatteries.com
www.portablebatteries.com

From: Carlos

Sent: Monday, March 23, 2009 3:15 PM
To: info@greenbatteries.com
Subject: Question on the Maha 9.6v 230mAh NiMH battery

Hello,

Last year our church purchased 10 of your 9v 250mAh NiMH rechargeable batteries for use in our wireless mics. These batteries have performed well for us for the most part. Usually we will use a battery for a 1.5 hour practice period and then swap out the battery prior to the live performance for fear of them losing sufficient power, from the wireless mic, before the end of the service. The other problem we had initially was the plastic covering on the battery itself makes the fit in the wireless mic too snug. We had to remove the green cover to make changing out batteries much easier without cracking the plastic case on the mic itself.

I noticed that you now have a 9.6v 230mAh NiMH battery listed on your website for use with wireless mics. My first concern is will the battery fit in the battery holder of the mic? A typical Duracell or Eveready 9 volt battery fits in the battery holder with no difficulty. Does this 9.6v battery you offer fit the same dimension as the typical non-chargeable battery? Or will we have to peel off the plastic cover (if it has one) once again to fit them into our wireless mics?

My second concern is will these newer batteries hold their charge, under the power drain of the wireless mic, for an approximate 3 hour time period or will we have to change them out like the 9v green batteries mentioned above?

We love your product overall and wish to purchase these newer batteries in the near future if they meet our need. Please reply to all email addresses above with your answers

Thanks,

Carlos