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Gear / Technical Help => Ask The Tapers => Topic started by: 1westkc3 on January 01, 2007, 12:28:59 PM
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I purchased a 9v rechargable lithium polymor bat and charger (http://www.thomas-distributing.com/ipower-9v-lithium-rechargeable-battery.php) for use in my Church Audio ST-9100. I charged the bat per instructions until the green LED came on. Last night when I set-up I got no signal. I cheched all connections and all was correct. For grins, I switched to a alkaline 9v which I still had in my bag and voila! As you could imagine, this bat quickly ran low and the recordng is trash.
My question is, should I allow the bat much longer charge? This was the first use/charge of the bat, should it charge for longer duration the first time no just to when the green LED appears? Any recommendations?
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Might be this is really a 7.2 volt battery (made up of two 3.2-3.7 volt lithium cells in series inside a '9 volt' battery case)? If so, it may not run some types of electronics.
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This battery is supposed to be a direct replacement for an alkaline 9volt, in terms of voltage and capacity. I believe it requires a special charger.
http://www.thomas-distributing.com/ipower-ip-fc904u-9v-battery-charger.htm
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Yup...got the charger too.
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Check the charged battery with a volt meter and see what you have.
If not close to 9v I would call Thomas-distributing and see what they say. I had a problem with one Sanyo 2700mah AA battery I bought from them. They were both knowledgeable and helpful. They ended up sending a replacement out that day.
Please post back how you make out with this, I was considering grabbing a couple of these 9v plus the charger.
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I checked the bat the next morning after a 12 hr charge with a multi meter and it only showed
8.4v. I spoke with the company I purchased the Lithium Polymor 9v from and
he said it will only charge to 8.4v. He suggested I switch to the following
MAHA POWEREX 9.6V RECHARGEABLE BATTERIES - IN STOCK
*** New Improved Capacity now averages 230 mAh ***
Excellent for Commercial, Paint ball or Industrial Applications.
These 9.6 Volt rechargeable batteries are the true "9.6V" rechargeable
batteries.
Most commercially available 9V rechargeable batteries are only 8.4V and
don't work well in paint ball hoppers and some other equipment.
Actual 9.6V NiMH Rechargeable Battery 9.6V @ 230mAH More...
Your Price $9.67 ea. 3 lot $9.37 Ea. 6 lot $8.97 Ea Order#
MH-96V230
So one of those is on the way.
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I spoke with the company I purchased the Lithium Polymer 9v from and
he said it will only charge to 8.4v.
I am surprised to hear that, I thought the lithium polymer's were supposed to be 9 volts right on the money. :(
Not sure what I am going to get now, at 230mah the NiMH is less than 1/2 the capacity of an alkaline 9 volt.
Guess I'll get two and carry a spare.
Thanks for posting your findings.
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Update: I exchanged the above mentioned lith poly bat for a Powerex 9.6v bat. I checked it out of the box and checked it with the multi meter, it showed 10.1v. This past Sat night I took it out for a trial run (The Gourds) but not before putting a fresh charge on it (registered 10.2v). The total recording time with opener was 2:42:21. Checked again after getting home, 10.1v. Guess that problem is solved.