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[U-33]

Am I ok to be charging a 7.2v 1600a/h nimh pack at 250m/a?


Rich

[Stavros]

Cant see any reason why not BUT it will take around 8 hours to charge
 
 
Dave

[Tug-Kenny RIP]

This is a good question.

@ Dave.  What do recommend the maximum charge rate could be please.

Cheers

ken

[U-33]

Cheers Dave, I'm in no rush to use it, so that'll do nicely.


Thanks mate,


Rich

[Stavros]

Ken to be perfectly honest with you and this is a PERSONAL view on this the max charge I would say would be 1600milliamps....you should never charge ANY batt at a higher charge rate than what is stated on the batt.
I have been charging batts similar to this at a couple of milliamps below the stated capacity and have never had a problem....some of my batts are now over 6years old and are still as good as new.
 
2200minh would be charged at 2000milliamps.........OR poss lower....some of the batts will not allow a higher rate on my charger,I get volts cell error and all I do is either Lower or Put up the charge rate accordingly....I must admit I have cheated and put the charge rate on all my batts with a permanent marker.
 
 
Dave

[Robert Davies]

This is a good question.

@ Dave.  What do recommend the maximum charge rate could be please.

Cheers

ken

WARNING - this advice apples to HIGH QUALITY CELLS ONLY!! - if in doubt ASK!

If I can pick up on this - with high quality cells, of which the illustrated cells VapexTech(VP), I consider the very best, I have charged at the same rate as the capacity with no ill effects at all

eg Battery capacity in this case 1600mah, charge at 1600mah - the greater number of my batteries are 5000mah, so I charge at 5000mah.

Now, because VP batteries are high quality, I have charged them at or above double their noted capacity (1600mah battery charged at 3200mah) but have on occasion played a deskfan across them to cool them as they were charging and for 10->15 mins AFTERWARDS too.

High quality cells are made by VP, GP, and Sanyo - I have found others to work OK too, but only selectively within the brand  - say 2500mah brand X are fine - but the rest within brand X are somewhat dubious.

[Tug-Kenny RIP]

Well worth knowing guys.  Thanks for that.


Ken

[U-33]

I'll second that, Ken...very useful information. Thanks fellas..


Rich

[essex2visuvesi]

With the NimH I find charging at the rates listed above (for example 1600mah pack at 1.6A) to give the best results. However I like to fully discharge (using the discharge feature on my charger) and then overnight trickle charge every 4th or 5th "fast" charge

[Tombsy]

Just an aside, the above info is also considered a "1C" charge on a lipo battery. E.G. 5 amps for a 5000mah pack, 1.6 amps for a 1600mah pack.

[Klunk]

Ok I'm more than a little confused.
Just to get it in my head.....
Slow charge I normally do at 1/ 10 of mahis of battery.
Fast charge your saying is done at  just below max ma of battery?