Cell Help/Vented cells

[Jeff Wohlt]

I have some 1700 cells and they have been pretty good in the past. I got some very hot several times.

I was discharging some the other day and heard the hiss!

Tell me how I can figure out which one it is.

I would also like to know how to check cells. Can I put a 20 amp load on them from my bulbs and check voltage? They seem to all have good volts but I think some cells are shot.

I hate to pitch them not knowing if they are bad or not...I can at least put some together for the kids to play with in their boats.

Any help would be appreciated.

[Jeff Wohlt]

This one is coming back to the top because I was hopping for some info on cell checking and the hiss I heard...some say they do that with age...beats me.

Any info is appreciated. I would like to save some of the good one s for my son's boats.

[AndyKunz]

Originally posted by Jeff Wohlt
Any info is appreciated. I would like to save some of the good one s for my son's boats.

Where did you get good 1700's?

Charge the pack. As you discharge it, note cell voltages. Bad cells will be low when discharging, high when charging.

Good thing these aren't soldered end-to-end, eh?

Andy

[Jeff Wohlt]

Thanks for the help. I was also told that the 1700 were not very good but were the best at the time and increased run time. I have gotten my use out of them.

I think I cooked them myself from being too extreme. The 1900 and the 2400 will be all I buy for now on.

I made some new 1900s for my cat since I am running two 4 cell packs in it.

When they are charged...they all seem fine. Guess I need to put a load on the pack with my bulbs (16 amps) and check them?

Should be an easy way to do this and I guess that is it.

[AndyKunz]

Yes, you have to do it with a good load on it. 10-20A should be about right.

You are looking for cells with high resistance. The way you measure resistance is to put current through it and measure the volt change.

Andy