Discharge rate for 6volt nimh.

[leelee]

I have a multiplex charger and was wondering what discharge rate I should set it at for 6volt nimh. It has values from .10 amp on up. Also to charge it what should I charge it at. They are 1650nimh so should I charge them at 1.6amp. I am use to using the sirus charger that does it automatically. Any help would be greatly appreciated. Thanks

[CRUISER]

charge rate = 35% so .6 amp should be safe and keep batts cool !
discharge rate could be roughly half of estimated servo draw again should be safe and give some idea as to how batteries are doing.

[blackbeer]

Nimh packs need to be carefully formed just like nicad. It also depends on the size of the individual cell. If this is a trans pack with 8 cells they are quite fragile. On my tx packs, 1650's both of them, I never use a peek charger. I form them with 3 cycles. Charge at .125 and discharge at .2. Yes it takes a while but I'm retired and have the time. I have a wall wort that I use for them that puts out .1 and thats what I use. When I'm forming a pack this way I charge until there is a slight increase in the temp of the pack. Then I know it is fully chaged. Then I discharge with my Bantam BC6 at a rate of .2 or .3, with 1 volt per cell as the cut off. Once formed I get about 5-6 hours per charge. I run my tx down to 9.6 volts before I charge the pack again.
On the larger cells that I use for my flight packs I form them in the same way but after about 3 cycles of slow careful charging and discharging I charge at .4 with my BC6. There is a lot of very good info on this site: http://www.hangtimes.com
Hope this helps.

Tom

[smokin]

	Quote: Originally Posted by blackbeer
	Nimh packs need to be carefully formed just like nicad. It also depends on the size of the individual cell. If this is a trans pack with 8 cells they are quite fragile. On my tx packs, 1650's both of them, I never use a peek charger. I form them with 3 cycles. Charge at .125 and discharge at .2. Yes it takes a while but I'm retired and have the time. I have a wall wort that I use for them that puts out .1 and thats what I use. When I'm forming a pack this way I charge until there is a slight increase in the temp of the pack. Then I know it is fully chaged. Then I discharge with my Bantam BC6 at a rate of .2 or .3, with 1 volt per cell as the cut off. Once formed I get about 5-6 hours per charge. I run my tx down to 9.6 volts before I charge the pack again. On the larger cells that I use for my flight packs I form them in the same way but after about 3 cycles of slow careful charging and discharging I charge at .4 with my BC6. There is a lot of very good info on this site: http://www.hangtimes.com Hope this helps. Tom

tom, great post. we do things the exact same way! even after proper forming, i only charge at about.8amp.