Veo 100 Battery

[Charlie99]

I've measured battery voltages before and I think there might be only a slight difference between a new one and the few days old one .. 3.0something verses 3.1

The problem is most likely the voltage while loaded, not the unloaded or open circuit voltage. Or to say it a different way, some batteries have too high of internal resistance to work properly in equipment that uses the battery for short high power bursts, even if the overall average power drain is low.

A well designed system would do the battery voltage test while under load. It sounds like the VEO100 does not do this, and therefore gives a falsely optimistic battery charge indicator. You could do a manual test of this sort by measuring the battery voltage while it is loaded with a 100 ohm resistor (about 30mA of current draw). If the "good" vs "bad" battery doesn't show up under that test, then try 50 ohms/60mA loads.

The Pelagic/Oceanic computers that use 1/2AA Lithium batteries also have this sort of problem. In that case, I've found that any battery that the manufacturer has rated for "pulsed duty" will work, while the ones designed only to supply very low levels of current for a long time to realtime computer clocks do not work.

Charlie Allen

 

[D_B]

Ok I understand now (the too much charge thing threw me)
... the non recomended batteries are not able to handle the current draw of the computer

Dang, this is likely to cost me as I've already sent it in to have them look at it
... I wish I had remembered the Sony/Panisonic battery thing

 

[D_B]

The problem is most likely the voltage while loaded, not the unloaded or open circuit voltage. Or to say it a different way, some batteries have too high of internal resistance to work properly in equipment that uses the battery for short high power bursts, even if the overall average power drain is low.
...
The Pelagic/Oceanic computers that use 1/2AA Lithium batteries also have this sort of problem. In that case, I've found that any battery that the manufacturer has rated for "pulsed duty" will work, while the ones designed only to supply very low levels of current for a long time to realtime computer clocks do not work.

Charlie Allen

I found this info on Sony CR2450 batteries ...
Sony CR2450 Specifications
3V ... Nominal Voltage
2.5Ｖ 600mAh ... Nominal Capacity (2.5V cutoff)
0.4mA ... Recommended Continuous Drain
24mA ... Recommended Pulse Drain

And Panasonic ...

Two Design Types—BR & CR:
Panasonic coin type lithium batteries are available in two types: BR series, poly carbon mono-fluoride lithium batteries for uses requiring extended reliability and safety, and CR series, manganese dioxide lithium batteries for uses requiring high voltage and strong load pulse characteristics.

... only Sony and Panasonic (found so far) has a Pulse Drain rating or say they are for pulse duty

Was interesting to compare brand capacities/specs , from this site ... Battery Technical Specifications at Micro Power Battery

 

[D_B]

Got some word back ...

The LDS called and left a message .. want's me to call them back to discuss "options" concerniing my computer .. I'll let you know what they say

 

[Jim-C]

I have the Veo 100 all most 2 years old. I changed the battery for the first time. After one day of diving battey read low and showed wrong date & time. On the drive home it shut down completely. I restarted it several times allways showing a low battery and shutting itself down. One week later I put another new battery in. After first dive showed low battery and wrong date and time. The rest of the day it went back and forth FULL battery LOW battery. I put the first battery back in and now its sitting on my table readig FULL battery running through thr pre dive mode.
I would appreciate any in put .

Jim

Oceanic found my computer to be defective. So they sent me a rebuilt one in its place. My computer was all most 2 years old with only 30 dives on it. I have no way of knowing the history of this one. Oceanic assures me they check these out real good with a lot of new parts. I guess I'm worried about the parts that checked out fine and weren't replaced in the rebuild process but may have a lot of use on them. Could be tomorrows problem????

Any in put on rebuilts would be appreciated.
Thanks
Jim C

 

[D_B]

My understanding is that it's a new computer inside a used case .. that's what they sent to me when my VEO100 had a cracked battery cover when I first got it

This is what I decided to do ..

OK, LDS called and Oceanic no longer carries the VEO200 (no surprise) and they are willing to upgrade me with a VEO250 (refurbished, all new parts inside case) for a fee, I wrangled with my LDS a bit and got them to lower the cost to a point that I thought was fair (and a good deal)
So I am happy with it but ....

I wish someone would change the info in the manual to state that only certain button cell batteries are acceptable.

That would have avoided the frustrations that I've had with mine ...

 

[philmayer]

Oceanic found my computer to be defective. So they sent me a rebuilt one in its place. My computer was all most 2 years old with only 30 dives on it. I have no way of knowing the history of this one. Oceanic assures me they check these out real good with a lot of new parts. I guess I'm worried about the parts that checked out fine and weren't replaced in the rebuild process but may have a lot of use on them. Could be tomorrows problem????

Any in put on rebuilts would be appreciated.
Thanks
Jim C

Oceanic replaced my PP2 with a rebuilt one last Spring. It's just as bulletproof as my first one. There's no need to worry about it. Just go out and dive!