[time-nuts] ***SPAM*** Motorola Oncore UT+ firmware upgrade & backup power questions

[Pete Stephenson]

On Sat, Mar 14, 2015 at 12:56 PM, Mike Cook <michael.cook at sfr.fr> wrote:
>
>
>>> If true, what is the maximum current that can be
>>> safely supplied by the pin? As above, is it safe to use a
>>> non-rechargeable battery like a CR2032?
>>
>> I have a couple of UT+ receivers which were not equipped with batteries and I used a CR2032 for backup without any issue. They were disconnected sometimes for considerable periods on a number  of occasions and the saved data was always accessible on power up.  I don’t know how long a battery like that lasts. I have one, powered off, still with the battery in circuit that I pulled in 12/2010. Hmmm. might be worth powering it on to see.
>>
>
>   Well, I dug it out and checked the voltage across the CR2032. Down to 2.8volts after 4yrs 3mths. Connected up the receiver ad powered up.
> It came up in position hold mode with the coordinates that were stored in 2010. 1PPS is on but I am only seeing 2 sats and am not to sync’d to UTC. I think the almanac may be no good. I’ll leave it a while and see if t recovers.
>
> Anyway. Using a CR2032 is OK, at least with my hardware and you get backup for at least 4 years.

Fantastic. Just what I wanted to hear. Thanks for checking.

Also, my apologies for sending a blank reply to the list a moment ago.

-- 
Pete Stephenson