[quote=wolfdog1226I asked HKJ earlier today if 12v/3a is enough for 4 batteries @ 1amp?: Easily, 12V 3A is 36 watt, 4 batteries with each 4.2V charged at 1A is 16.8 watt, there is a lot of spare power for display and heat.[/quote]
What I did not say was that it requires that the charger know how to handle the power. The first versions of the C3100 charger was very bad on that, in later versions it was improved, but not perfect. This means that a sensitive power supply may give the charger problems.
But you have the problem during discharge and that do not make any sense, the charger is not supposed to be loading the power supply when doing discharges.
That means you power supply is rather sensitive, try a more powerful one. The opus charger do have some nasty spikes in its power draw, a large capacitor in the power supply will handle it (or a slow over current limiter). The problem is not the average current draw, but the peak current draw, the power supply supplied for my test had no problems with the “fixed” version of the Opus, but a power supply with very fast over current protection will have a problem.
A guess would be that Opus has change supplier of power supply, without checking if it can handle the requirements of the charger.
YEP)!!! That is exactly what mine does. :+1:
Which I really would not mind so much….
…BUT for the fact that ALL the Capacity data is lost and resets each time it does it. :person_facepalming:
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Jon from Liionwholesale’s guess is that it is overheating and/or may have a failing/bad thermal sensor?
EDIT: The theory about over heating makes no sense to me because the charger NEVER feels hot. The power supply gets warm but not hot like Opus number 1!
I doubt it, in my opinion the most likely cause is the power supply. The Opus will draw more than 3A in peak current, in my test I measured 6A for nearly 0.02 second. Then 0A for 0.03 seconds, bringing the average below 3A
Hey wolfdog…… what size is the plug that goes into the charger?
I am not home right now to look.
But I am gonna try to pick up a used power supply at the electronics shop in town before I go back to the compound.
But I need to know the “plug to charger” size………
Thanks in advance for any help given here………… :+1: …
Let me look,not sure if I can decipher while it is charging!
I looked on line for these and they were $15 and up,I do not want to pay half the cost of my charger for a power supply! I am not confident If I ordered one online that it would be the right one,when I can just get another opus,probably w./ the same issue!!
There is no indication of the size of the barrel plug in the manual or written on the charger/plug itself. It will take 10 or 15 minutes to post pictures,that will give info gausse wants but may not help for barrel plug size.
I’ve tried to make my 3400 produce the problem—it won’t do it—charging (4) 30Qs at 1amp without a hitch—-my 3100 is at my camp—I have also tried my power supply from my hobby charger 12v/ 5a —-works perfectly—these are readily available on ebay— also I’m curious if anyone has a car adapter—try it in your car on straight 12v
I just retested my 3400 with my 2a power supply—-it reset almost the instant it started charging—I’m pretty confident it’s a power supply issue—if I remember correctly the 3100 has a more rounded edge PS—where as the 3400 I have it’s square—most likely updated