Thread Tools
Old Sep 11, 2006, 10:10 AM
tocano is offline
Find More Posts by tocano
Registered User
tocano's Avatar
Discussion

How to test nicad battery cells?


I have 3 packs subc cell 8 cells Sanyo CP2400.
They are 3 years old but I have not used them that often since I don't fly regularly.
Now I found that they don't discharge high current for long anymore.
I use them for my Corona heli and I have very short flight with them but fine with other battery packs.
The problem packs are all Sanyo CP2400 cells.
Is there a simple way to test the cells individually. I am thinking of disassembling the packs and use the good cells.
Maybe I can get a couple of packs out of them.
Last edited by tocano; Sep 11, 2006 at 10:56 AM.
Sign up now
to remove ads between posts
Old Sep 11, 2006, 10:18 AM
hall woo is offline
Find More Posts by hall woo
Permanently Banned
CP2400 leak a lot, bad cells
Old Sep 11, 2006, 10:40 AM
soar-ne is offline
Find More Posts by soar-ne
soar-ne
tocano:
Try a slow charge at around 240ma for 14-16 hours, they may wake up... From what I understand nimhs dont like to lay around totaly discharged like nicads so they may be history, but I would give it a try anyway I would check them every so often for excessive heat though if you decide to C/10 charge them!!!!!!!!!!
Good Luck
Bob
Old Sep 11, 2006, 01:22 PM
hoppy is offline
Find More Posts by hoppy
Space Coast USA
hoppy's Avatar
Might have to do it a couple of times
Old Sep 11, 2006, 02:39 PM
sjslhill is offline
Find More Posts by sjslhill
Registered User

Question for you Hal


Where do they leak Hal? We have sold thousands of these cells and they have been used in Combat Robots for years and last hundreds of cycles.

DMA uses hundreds of thousands of them.


Quote:
Originally Posted by hall woo
CP2400 leak a lot, bad cells
Old Sep 11, 2006, 02:41 PM
sjslhill is offline
Find More Posts by sjslhill
Registered User

My thoughts


If you have not used these very often they can be recovered easily with a few cycles. CP2400 cells will last 500 cycles if they were not abused.

thanks,
Steve

Quote:
Originally Posted by tocano
I have 3 packs subc cell 8 cells Sanyo CP2400.
They are 3 years old but I have not used them that often since I don't fly regularly.
Now I found that they don't discharge high current for long anymore.
I use them for my Corona heli and I have very short flight with them but fine with other battery packs.
The problem packs are all Sanyo CP2400 cells.
Is there a simple way to test the cells individually. I am thinking of disassembling the packs and use the good cells.
Maybe I can get a couple of packs out of them.
Old Sep 11, 2006, 09:21 PM
tocano is offline
Find More Posts by tocano
Registered User
tocano's Avatar
Thanks everyone.

I will do a slow charge on them.
The 3 packs seem to have lost the high discharge soon after I replaced my supernova 250S charger with a swallow/hyperion charger. I had ebayed the supernova.
I don't know if it's a coincidence or the supernova charger has a better charging system? They still take 2000 mah+ charge though.
Old Sep 11, 2006, 09:40 PM
sjslhill is offline
Find More Posts by sjslhill
Registered User

oh...


I expect your not getting them fully charged.


Quote:
Originally Posted by tocano
Thanks everyone.

I will do a slow charge on them.
The 3 packs seem to have lost the high discharge soon after I replaced my supernova 250S charger with a swallow/hyperion charger. I had ebayed the supernova.
I don't know if it's a coincidence or the supernova charger has a better charging system? They still take 2000 mah+ charge though.


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
how to test a battery? 60ndown Batteries and Chargers 3 Oct 18, 2004 05:56 PM
How to test mAh value for 9.6v battery pack Maxx1010 Beginner Training Area (Aircraft-Electric) 8 Aug 13, 2004 06:25 PM
How to test for balance in li-poly cells? gotak Batteries and Chargers 3 Oct 17, 2003 07:05 PM
How to test a Battery cubsflyer Batteries and Chargers 3 Aug 19, 2003 11:12 PM
How to test if a nicad is properly charged John Webb Electric Plane Talk 11 May 09, 2001 11:52 AM