Pro cell batteries

In a recent purchase of Pro Cell batteries that were marked with a March 2006 shelf life, one needs to check the voltage on these to make sure they are above
8.6 volts. Over the weekend i used one in a reliable altimeter that had over a dozen flights on it, and after the drogue charge fired, the altimeter reset itself, thus causing the rocket to come in semi-ballistic for a very hard landing. It sustained heavy damage to the nosecone, payload/av bay, and lost 4 of the 8 fins on the booster. All has been repaired so far except the booster. So, i suggest to ALL flyers, check the voltage on those NEW batteries always before installing them. A mistake i will never make again. Jim
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
and check then while loaded down, also
--
Tater
President of MARS Club (NAR #660)
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
@maps.charter.net says...

If they show 9 volts or over on the Fluke voltage tester, I use them. Hundreds of flights, never a failure due to battery voltage.
Notice, I do not address failures due to "Kurt is a dumbass syndrome", only those for which I could blame a battery.
--
Tweak

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
It's not just the voltage that may be a problem with the batteries. One condition you want to check for is how do the individual cells within the battery make contact with each other. If the battery cells are not hard contact welded or soldered, they are prone to lose contact due to G forces. Take one of the batteries apart and check for the condition. If the contact connection method between cells is present, use the batteries for your home smoke detectors. Perfectflite @ the following address, sells a nickel hydride battery and charger:
http://www.perfectflite.com/cgi-bin/microres/PF_Store/perlshop.cgi?ACTION=enter&thispage=page1.html&ORDER_ID =!ORDERID!
The battery internal cells are hardwired together. I have been using a set of these batteries for about 6 months, with a dozen or so flights in Perfectflite, Transolve, and BlackSky Altac units and they work fine. Also, I'm sure there are other batteries that will fit the bill to.
Fred
JAO6469 wrote:

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Were these batteries powering both the altimeter AND the charges?
Doug
--
Posted via Mailgate.ORG Server - http://www.Mailgate.ORG

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
@aol.com says...

What altimeter? I know a gwiz will do that with one battery.
The bigger, (or more you like) the rocket, the more redundancy you need.
--
Tweak

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Tweak wrote:

I try to set up altimeters with separate "pyro" and "CPU" batteries whenever possible. It's possible with some but not all models. (The G-wiz LC series are particularly well adapted to two-battery operation.)
-dave w
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
says...

Not suprising, as it is a "neccesity" with the Gwiz. Although I remember now that it's behavior is a little different, as it will blow both charges if the voltage is low, so you get to walk instead of dig.
Just about my favorite piece of electronics. The standard works fine as a backup with one battery for a redundant apogee event.
--
Tweak

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 10 Nov 2004 03:41:28 GMT, snipped-for-privacy@aol.com (JAO6469) wrote:

Hello Jim,
Over in the live sound production group, they don't use Pro Cells--The don't cut the muster to power wireless mics during a show compared to the other batteries available.
Just curious but what kind of load was on the battery when you measured it?
Sorry to hear about the dart...
Andy
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Mon, 15 Nov 2004 20:38:53 GMT, snipped-for-privacy@houston.rr.com (Andy Eng) wrote:

What kind of batteries do they use for the mics?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Phil wrote:

<snip>
<snip>
Hello Phil,
Oddly enough, a popular battery amongst those folks is the duracell copper clad changed out every set. Most of their wireless gear doesn't degrade gracefully. We had a unit that somehow missed it's battery swap out and the results were flat out ugly. We've got oodles of half used batteries stacked on the shelf that the performers refuse to use !?!?!?!?!
I recall reading a Consumer Reports that for steady draw applications, plain old alkalines are fine but for periodic high current pulls (i.e. camera flashes) the Duracell Ultra was the best but that was about five (?) years ago...
Take care, Andy
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
wrote:

Thanks for the info. I've been using the Duracells sucessfully for a long time.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
I was using a Perfect Flite MAWD, it was in its 12th flight. This was a fresh battery. No biggie, just finished most of the repairs on it now, and have the booster section to go, 3 of the 8 fins to re-epoxy, and 1 of the lower fins to replace. Its ok, the season is basically ended here so it gives me time to tidy up the fleet, so to speak. Plus im building a new Chubsy, stretched up another 36" for dual deployment and with a 75mm MMT. It can take up to a full M if i choose. And this time i have basically iron-clad(ed) the entire rocket with glass and West System. The spring will be lookin good :-) Jim
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.