Topic: Some Feedback from Davis

[jchen]

Question:

I am thinking about replacing the NiCd batteries in my FARS. I understand that standard batteries are 1.2 v and 2400mAh. Would it be a problem or inadvisable to replace them with either high capacity NiCd's (1.2 v 3000-3500 mAh) or LiMh batteries (1.2 v 3500-5000 mAh)? If it is not a problem, would the charging circuit be adequate?

Answer:

There is no need nor advantage to using higher-capacity batteries to power your FARS.  I would recommend using the same rating.

Question:

I note the documentation suggests changing the batteries every two or three years. Have your or your customers indicated any personal experience as whether its closer to two or three? I guess it would be better to do it proactively than to wait until the batts failed in the dead of winter on a snow covered roof. Same question regarding the FARS fan motor. Is the duty cycle really only two or three years?

Answer:

I would replace nothing proactively.  Lifespans vary by quite a bit. I would just wait until you have a definite need.

[weatherforyou]

I note the documentation suggests changing the batteries every two or three years. Have your or your customers indicated any personal experience as whether its closer to two or three? I guess it would be better to do it proactively than to wait until the batts failed in the dead of winter on a snow covered roof. Same question regarding the FARS fan motor. Is the duty cycle really only two or three years?

Answer:

I would replace nothing proactively.  Lifespans vary by quite a bit. I would just wait until you have a definite need.

After having my station down for almost two weeks because the battery died and we didn't have a break in the wind, rain and snow for that long, I'm replacing mine every other September.   

[Cienega32]

After changing the "1 year+" batt on my 2nd temp sensor board after 5 months (as others have also done), I'm very curious as to the general FARS batt life-span reported by users.

Sounds like a good basis for a poll showing failure times and/or pro-active times!


What's the current price on the motor?

[jchen]

Archer Trading Post - $40.00 plus shipping, Davis wanted $45.00 plus shipping for a total of $54.00