PWM charge vs. CC charge

[davidefromitaly]

i see that high end chargers like the ICE, triton, iCharger... all use CC charge for ni-mh batts

while chargers like the BC900 and C9000 use PWM, the primary reason i think is cause PWM is cheaper, but is good on batteries?

these chargers have a pulse of around 2A, maybe is safe on a AA, but on a AAA isn't too much?

i know that the PWM help to break the crystalline formation but i prefer to use it sometime, not always... on the C9000 for example i prefer a break-in with PWM but CC for the standard charge, also because is easier and more accurate to see the voltage drop

 

[VidPro]

pulses are working good here, it slams the battery with good power, but doesnt cause heating. rates like 500 on the 900 doing a 50-50, and the new maha chargers on "soft charge" we have been testing pulsing li-ion even.
but on the AAA at 2 amps , that IS rather harsh , the biggest problem is going to be at the END , when it is heating up and more of the charge is turned to waste, the Mahas seem to cool out better neer the end. the 9000 is said to have a voltage max, and the other maha i am using is a lot kinder than some of the other stuff too, i think it may be applying the same idea.

if you want the best of all of them, use the one that slows down at the end, BUT still can stop properly. from what i hear the triton will, and the 9000 has ways it can.
also these chargers that people say "the batteries stay nice and cool, but its only 90% charged" would have terminated earlier, and Mabey all they need to do at that point is let them finish up with topping, instead of pulling it then.

many of the universal Maha chargers use much slower rates for the tiny cells, the latest i am using from maha even seems to use a duel power, to baby the AAAs.
only problem is the really good chargers cost a lot more.