Using different chargers with different brands of NiMH batteries

Is there any problems or issues with using them? I have a Costco
Sanyo 2100 mAh Quick Charger and also an Energizer Slow Charger
(E127209), 2h7.

Last night i charged the Sanyo's in the Energizer slow charger because
I am not getting the same performance as the Energizers which are
2100's too. The damn red idiot wouldn't turn green or shut-off. But
the charger was very warm. I ran the same Sanyo's in it's own charger
and it did it's trick within a few hours and shut-off.

So, I was wondering if I can still swap the two batteries in different
charges.

Opinions/comments welcome.

Thanks