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Model Forum / Radio Controlled / Air Models / November 2004F Cell 8ah
I just got a new 8ah Ni-Cad F cell to repair my golf trolley battery, I think they are made by Yuasa. I trickle charged c/10 it for 20 hrs as normal as you do, then discharged it with the Supernova and it only put out 4ah, discharging at 1,5A the cell voltage was right down at .9v right the way through the discharge, Then charging it at 2ah it peaked at 1.95v after 3ah. I recon this cell is faulty or very weak? or could it be the supernova is no good at charging a single cell? any ideas folks? Stew > I just got a new 8ah Ni-Cad F cell to repair my golf trolley battery, I > think they are made by Yuasa. [quoted text clipped - 8 lines] > > Stew Just charge it on your Supanova at C/10 (0.8A) on the lead acid cell settings make sure you set the cell voltage as well (going to be either 2v, 6v or 12v) and see what it accepts and then discharge it to see what comes out at 1 to 1.5A. You didn't try to charge the cell on the automatic setting did you? As far as I know most gell cells won't take a fast charge rate, Yuasa's (if that is the cell that you have) sealed cells will accept a charge rate up to 0.25C (which is probably where your 2A came from). If it was me I'd charge at a slower rate 1-1.5A until it's cycled a few times. Chris >> I just got a new 8ah Ni-Cad F cell to repair my golf trolley battery, I >> think they are made by Yuasa. [quoted text clipped - 25 lines] > > Chris charge a NiCd on lead acid settings I dont think so Chris? not sure if the Super nova will charge a 8Ah cell, have you tried to charge it again after it has cut out the first time it might have timed out rather than Delta peaked does the trolley run on 1 cell or are you replacing just 1 out of a pack? Kevin >>>I just got a new 8ah Ni-Cad F cell to repair my golf trolley battery, I >>>think they are made by Yuasa. [quoted text clipped - 32 lines] > does the trolley run on 1 cell or are you replacing just 1 out of a pack? > Kevin It's a 13 cell pack, all 8ah Ni-Cad F cells. One of the original cells has shorted to I removed it and soldered in a wire for the time being, so it's now a 12 cell pack. The supernova charges this pack up no problems, it dumps in 5amps right up to 9.5ah and discharges to 8.5ah as it should. http://www.powerstoredirect.co.uk/ is where I got the spare cell from. Even if I set the supernova to manually charge at 5a it wont go any higher than 2a, maybe these cells are just rubbish quality? >> peaked >> does the trolley run on 1 cell or are you replacing just 1 out of a pack? [quoted text clipped - 8 lines] > Even if I set the supernova to manually charge at 5a it wont go any higher > than 2a, maybe these cells are just rubbish quality? sounds like it, try to cycle a few times and if you dont get the rated capacity send it back |
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