[NSRCA-discussion] batteries?

[John Ferrell]

I believe the market has confirmed your choice. The availability of NiCads seems to be shrinking. The latest crop of NiMh (Eneloop, Sanyo) looks to me like it will have own the entire market place soon. LiPo's still seem to be the best power/weight ratio for those who need big batteries but remain less user friendly.

John Ferrell  W8CCW

"All that is necessary for the triumph of evil is for good men to do nothing." -- Edmund Burke
...."The problem with socialism is that you eventually run out of other people's money."  
   MARGARET THATCHER 
http://DixieNC.US


  ----- Original Message ----- 
  From: George W.Kennie 
  To: NSRCA Mailing List 
  Sent: Thursday, April 16, 2009 3:12 PM
  Subject: [NSRCA-discussion] batteries?


  TOO COTTON-PICKIN' QUIET on here so I thought I'd stir the waters a little.

  I remember, several times hearing on this forum that Nickel Metal Hydride batteries were not all that desirable of a choice
  when making the decision to make up a pak due to their tendency to self-discharge and other erratic anomolies.

  I feel compelled to relate my experience. I put a set of 2500 ma cells in my Txmitter a little over a year ago. 

  When I take this unit off of charge, many times it has indicated a voltage of 12 Volts (usually 11.9). My previous charge
  was done last September and even though we are located in the N.E. where we sometimes fly in temps ranging into 
  the low 20's, we do get out quite a few weekends throughout the winter. Despite the fact that I never take my Txmitter
  out of the car all winter long and it's subjected to 5 degree nites, which I'm told is not good for batteries, I charged it 
  about a week and a half ago and since September it had finally dropped to 10.5 Volts.

  Special Paks?, you ask?  I go to Best Buy and pick 'em up and solder up my own. They're not significantly cheaper
  than commercially available stuff I could buy, but when the impulse strikes, I conveniently go and get 'em. Nice !

  Since a week and a half ago I've only flown about 3 times, but the thing is still reading 11.5 !

  Now I do have to admit that they like a slow charge better than fast, but I never slow charge the flight paks I wire up
  for my planes and I don't own any planes with commercial flight paks and some of them have more years on them than
  I would dare to mention in this group.

  Soooo, If you've been considering a NMH pak and you have doubts or concerns, take my experience for what it's worth !?!

  G.


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