[NSRCA-discussion] NiMH follow up

[Rcmaster199 at aol.com]

Gents, it has been stated before and always is worth repeating: one of the  
best fast chargers for NiMH and NiCd is the Peak Electronics Sirius charger. It 
 plugs into the car's lighter socket and works at a couple charge rates, 500 
and  1000 ma. It has built in detection and stops the charge when battery is 
fully  charged so no danger of overcharging with this charger. 
 
Ed's points below are on the mark. For more detailed information you should  
visit Radical RC's website. Bob Thacker has much great info on care and  
feeding
 
Matt
 
 
 
In a message dated 2/27/2006 6:41:04 AM Eastern Standard Time,  
ed_alt at hotmail.com writes:

Ed:
Yep, 1/10C would be 220 mA for your 2200 mAh  pack.  To condition a NiMh pack 
when brand new, you do several  conditioning charges at 1/10C.  You want to 
go a full 24 hours at 1/10C,  do a discharge to complete a cycle and repeat for 
a total of 3 or 4 full  cycles.  This will generally get you to full capacity 
and also gets  the cells ready to accept higher rate charging and with the 
right charger,  they will then start to give a reliable indication of when they 
have  peaked.  After these first conditioning charges, you do not want to  
exceed about 16 hrs at 1/10C, though at 1/10C it's a low enough rate that  you're 
not going to damage it if you do go over.  Anything higher  than 1/10C can 
shorten the life of the cells if repeated overcharging is  done.  The higher the 
rate and the more time it is overcharged, the  faster the degradation can 
occur.
 
Ed
 
 

----- Original Message ----- 
From:  _Ed  Deaver_ (mailto:divesplat at yahoo.com)  
To: _NSRCA Mailing List_ (mailto:nsrca-discussion at lists.nsrca.org)  
Sent: Monday, February 27, 2006 12:57  AM
Subject: Re: [NSRCA-discussion] NiMH  follow up


OK, for us non-electical whiz bang guys, please explain the C  charge.  I 
have heard it before and tried what was suggested on RCU  without success.
 
My new NmHD pack is a 2200mah, 4 cell pack.  To condiditon it  properly for 
first flights what should I do?  
 
Does 1/10 C mean charge at 220 mah for 16 hrs??
 
THanx for the explanation.
 
ed




 
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