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Old October 2nd, 2006, 03:57 AM   #1
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Wireless Mics: new Powerex 300mAh ?

Hi,

I've been using some older 170 mAh PowerEx 9.6V rechargeable 9V NiMH batteries for my Sennheiser wireless microphone system. There are some higher capacities out there, so I'm wondering if I should upgrade to the 230 mAh 9.6V or chance using the 300 mAh 9.0V .

http://www.thomas-distributing.com/m...ery-300mAh.php

They're listed as excellent for pro audio, Wireless microphones, but I'd rather go with an opinion from this board. Has anyone tried these 9.6V 300 mAh batteries ?
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Old October 2nd, 2006, 04:41 PM   #2
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After speaking to Eugene Thomas at Thomas Distributing, I've learned that these batteries are larger than the 170/230 mAh 9V's and may not fit in some wireless microphone setups. I'll buy one of the 300 mAh to check with my Sennheiser wireless system.
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Old October 4th, 2006, 03:45 PM   #3
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Here are some good pictures of NiMH and Alkaline discharge curves. Since the capacities aren't stated and given the rapid improvements in NiMH capacity, the NiMH X-Axis time scale should be much closer to that of the Alkaline.

http://lib.store.yahoo.net/lib/zbattery/nimh-curve.gif
http://lib.store.yahoo.net/lib/zbatt...line-curve.gif

from this source:
http://www.zbattery.com/rechargeablebatteries.html
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