Calling all Sanyo Ni-Cad Battery Experts

[johnws6]

I'm looking into purchasing some of these Sanyo N-1800 ck nicad cells and am wondering if they are any good for high rate discharge applications. I currently have 1/2 D saft VRE cells and they aren't all that great. They are listed on this site as being high rate and high temperature and are the old blue batteries sanyo had made before, i dont know if they still do however. Anyone know anything about these things? They are listed about 2/3 way down the page.

http://www.batteriesamerica.com/newpage3.htm

From the page:

" TEMPERATURE-RESISTANT CELLS Premium quality NiCd cells designed for the most demanding applications. Super value! (This is SANYO's "K" series, which is engineered for temperature resistance. They are very rare, and they are unsurpassed in quality and durability. They are in stock, but supplies are limited. Choose plain (untabbed) OR with Solder tabs. Solder tabs are $ 0.10 extra per cell. "

 

[Ted_Z]

Those are standard rate cells (~3C max). For high discharge I'd recomend the CP-2400 (sub C) or CP-3600 or N-3000 (C) cells.

http://sanyo.wslogic.com/pdf/pdfs/CP-2400SCR.pdf
http://sanyo.wslogic.com/pdf/pdfs/CP-3600CR.pdf
http://sanyo.wslogic.com/pdf/pdfs/N-3000CR.pdf

 

[Ted_Z]

I'd thought I'd follow up by saying that I'm using the N-3000 cells. While heavier than other technologies, they stand up to abuse and have a long life.

 

[docnjoj]

I've been using 4.5volt Sanyo DR's for a few years and they hold up quite well at 5C. I got them about 5 years ago for 1 buck apiece for 80 of em. I'll never see a deal like that again! Sanyo cells used to be the only thing to use in the 70s for high power electric model gliders and we sometimes ran them at 20-30C or higher. Great cells!
otherDoc

 

[Ted_Z]

FYI, I came across these cheap nicads today. $3.50 each for 4.5Ahrs. Their internal resistance is only 6mOhm so they should be good for reasonalby high discharges.

Data Sheet

 

[johnws6]

I've been using 4.5volt Sanyo DR's for a few years and they hold up quite well at 5C. I got them about 5 years ago for 1 buck apiece for 80 of em. I'll never see a deal like that again! Sanyo cells used to be the only thing to use in the 70s for high power electric model gliders and we sometimes ran them at 20-30C or higher. Great cells!
otherDoc

Are you saying these cells could take 30 c though? I can't find the spec sheet on them from sanyo, which is a little weird. Maybe they are really old? Either way the same cells in the same category have resistance of about 4.x which is pretty good. And the fact that they are temperature resistant may make them suitable to taking high discharge abuse? I'm not too sure though really. I bought 20 of these off ebay anyways to try out and see how they work, maybe i can take them to a local battery store and see what kind of figures they produce.

On a side note i've been searcing the bargin bins aka surplus sites for battery deals on mostly high rate nicads, but my luck so far hasn't turned up much. If anyone finds any bargains on such cells please post up.

 

[docnjoj]

No to the 30 C!!!! 5C yes! I failed to mention that we were lucky to get 5-10 flights before they either melted or just gave up. We would throw them into ice water after each flight! The competitors today in car and aero events abuse their cells in a similar manner, but NOT e-bikers. My post was only to mention that Sanyo still has a good rep for quality!
otherDoc

 

[johnws6]

No to the 30 C!!!! 5C yes! I failed to mention that we were lucky to get 5-10 flights before they either melted or just gave up. We would throw them into ice water after each flight! The competitors today in car and aero events abuse their cells in a similar manner, but NOT e-bikers. My post was only to mention that Sanyo still has a good rep for quality!
otherDoc

Woooooops. Just kidding. I'm looking at the sanyo n300cr cells, a few websites say they can do 80 amps continuous. The challenge will be to find them cheap.