The fan is purported to be "intelligent" and seems to just come on randomly. I don't know what algo it employs. Probably internal temperature. Afaik it's not configurable.
Thanks lowks.
For those who might be interested, I compared the specs of the Maha and NC2500 using the manuals.
Here are the differences:
Specs | Maha | NC2500 |
Charging current | .2 to2A | 0.2-2.5A |
Delta Peak | ? | 3-15mV |
Discharge termination | 1V | 0.5-1V |
Maintenance charge | 10mA | 30mA |
Temp. protection | ? | 55-70C |
Input power | 12V 2A | 12V 2.5A |
USB power | none | 5V 1A |
Supported capacity | 100mAh-2000mAh | 500mAh-3500mAh |
Battery temp | NA | yes |
Battery int. resistance | NA | yes |
Battery volt graph | NA | yes |
Backlight | Always on | Off after 10 mins |
Firmware upgrade | ? | via smart phone |
Smart fan | NA | yes |
Bluetooth | NA | yes |
country origin | Taiwan | ? |
warranty | 3 years | 1 year |
default charge AA | 1000mA | 1000mA |
default charge AAA | 1000mA | 400mA |
Buttons | 4 | 7 |
One "major" difference I noted was the maintenance charge. | | |
10mA for Maha and 30mA for NC2500.
Can someone comment why NC choose a higher maintenance charge?
Is a lower maintenance charge better? (can leave it in the charger for longer duration)
Could it be that NC is capable of charging higher capacity cells and therefore has to up the corresponding maintenance charge?