HP 67 Battery charger not working - any alternatives

[dbhp67]

Hi,

I have a Universal Charger which I used for the my RC models. That has every battery option known to man.

Looking at the 67 spare batteries I was thinking of using this in the meantime.

So, the spec on the batteries is:

NiCd (3 AAs)
1000 mAh

I have set the charger to NiCd and the current to be 400mA (.4C) and the charger has a delta peak voltage detection. Its a bit crude, but so far seems to be working. It hasn't finished charging yet. By my calculations it should take 1000/400 = 2.5 hrs.

Since I can't find an external battery holder to charge my 97 batteries I will probably use this method for them too!

Has anyone used these type of chargers for their calculators. Is there anything to be mindful of when doing this?

Thanks
db67