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Why sudden dramatic voltage drop in 700mAh 4.8v NiMh pack?

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Steve J03/06/2020 20:12:06
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Posted by Simon Chaddock on 03/06/2020 19:10:15:

High capacity (2000 mAh) AA size NiMh are a case in point. Their maximum current capacity is actually worse than a 500 mAh NiCd. The extra capacity thus offer no better performance when driving high current servos.

I would take a 2000 mAh Eneloop over a 500 mAh NiCd every day of the week.

Eneloop

eneloop2000.jpg

600 mAh NiCd AA (I can't be bothered to dig out a 500 mAh one)

nicad_600ma.jpg

(Both are Sanyo cells.)

Edited By Steve J on 03/06/2020 20:13:34

Jonathan M04/06/2020 06:04:19
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730 forum posts
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Thanks for the extra input on this one.

The lowest my charger will go is 0.1A so a 'trickle-charge' on the 700mAh is 0.14C which equates to about 8.5hrs.

Fast charging works nicely at 0.7C and 5mV peak-detect.

When cycling (only every now and then), any merit in discharging slowly?

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