MNPS

Hello,
By mistake I charged a new TX pack I built with new NiMh Sanyo 2500 with a Multiplex 5014 in NiCd mode. Before I noticed, they were charged up to 1600mah. The charge was at 200mah. I stopped the charge and switched the mode to NiMh and am currently charging at 200 mah/discharging at 500 mah (cycle) 4 times.

What damage if any may have occured to these brand new batteries????

Thankyou,
Joe

JNorton

My Feedback: (2)

If the batteries were not hot you should be fine.
John

gerwen

I don't think you could've harmed them at that charge rate. The difference between Nimh and Nicad charge types is peak sensitivity. When form charging a new pack, you WANT to go past the peak with C/10 rate to equalize the cells. Some folks trick their chargers into form charging a Nimh by setting it to Nicad so it won't peak.

Form charge is a slow (C/10) charge for ~16 hours. If your charger can't do 250mA then 200mA for ~19 hours should do the same thing.

Rodney

You were well under the 0.1C rate so no harm done, even if you had left them on for 24 hours.

MNPS

Thank you all for your answers.
Joe

SitNFly

My Feedback: (54)

Good point here. My Hitec CG335 (NiCd only charger) will charge NiMh batteries also. It's sensitive enough to catch the less pronounced peak of NiMh. I watched it the first couple times just to be sure it didn't boil my batteries, though...

JNorton

My Feedback: (2)

SitNFly,
Watch it when the NiMh packs get old - the knee is less pronounced and may lead to an overcharge.
John

Geistware

My Feedback: (16)

Do to the low charge rate, no damage was done.
If any damage was done it was from stoping the charging process before it was completed. The need for a NiMH specific charger is only for peak charging not overnight charging.

JNorton

My Feedback: (2)

Geistware,
I was answering SitNfly. His Hitec CG335 is a 12v operated delta peak charger capable of charging 4-24 cells from 270-3000mah. If I have replied to your post and it was for someone else I appologize.
John