[flysrcs]

I'm using NiMh batteries and want to discharge them in a manual cycle mode using my cycler. I guess what I'm askig is what is a safe discharge level per cell?
Thank you in advance
Dave,

[Dennis 9412]

Originally Posted by flysrcs

I'm using NiMh batteries and want to discharge them in a manual cycle mode using my cycler. I guess what I'm askig is what is a safe discharge level per cell?
Thank you in advance
Dave,

Hey Dave:

Try 0.9 volts per cell as your bottom end.

Regards,

Dennis

[flysrcs]

Dennis,
Thank you very much. I knew you had mentioned it at the last meeting but couldn't remember the actual value you had given. I'm trying the Hobby city charger off the default values as the default value are very generous to the safe side. The more I use this charger the more I like it.
Thanks again,
Dave

[aceplant00]

I was always told to discahrge Rx and Tx packs to 1.1 volts per cell

[Canamflyer]

I'm with aceplant00 on this one. Everything I've seen uses 1.1V/cell as a default for a reason....

[Ken Currell]

The industry standard is 0.9 volts.

I use this to test cells before I put them into a pack. It tells me the actual capacity compared to the specified capacity.

The accuracy of the reading can vary according to the accuracy of the equipment you use. I have several chargers but I always use the same one to discharge my cells. That at least gives me a consistant reading for all batteries.

R/C flyers use 1.1 as it gives a better idea of the useable voltage. Although the total ma reading will be less than the actual capacity of the cell it is more appropriate for our needs.

[Dennis 9412]

Originally Posted by aceplant00

I was always told to discahrge Rx and Tx packs to 1.1 volts per cell

Here is a quote from the Battery FAQ by Steve Anthony at NOBS Batteries. If you haven't read this before, it is excellent reading. Link is

http://www.hangtimes.com/rcbattery_faq.html

"Q: I have a programmable charger. What discharge rate and voltage cutoff value should I use for the Formation Process?

*

A: Most programmable charger/cyclers allow programming the discharge current and the low voltage cutoff level for the discharge. If using a 250-300ma (.3) discharge rate set the cutoff voltage value at 1.0v per cell. If using a 500ma (.5) discharge rate set it at .8v per cell. For formation charge/discharge routines on Rx and Tx packs we don't recommend using a discharge rate higher than 500ma (.5) and DON'T discharge under any circumstances below .8v per cell !! Packs with cell impedance ratings below 10 mOhms CAN de discharged at 1.0 amps AFTER going through the formation process.. BUT NOT BEFORE."

As Ken Currell says, the industry standard is 0.9 volts per cell

From the FMA Super Nova 250S Charger/Cycler Manual.

"End of discharge is designated as 0.9V per cell to conform to worldwide manufacturers current designation of end point."

Regards,

Dennis