Instinct - battery drain after 6.60

if the output power of USB is only 1 watt and wall charger 3 watts, there is a difference, wall charger will be faster and they recommend slower, or that is what I understood. With voltage you are right, 5V not more.

The devices have their own current regulators. They do not consume more electricity than they can. The quick charger will not charge your old phone faster.

6619804 said:

I have never heard about wall charger with USB connector, which would give more than 5V.

Have you ever measured a crappy chinese charger? Not only the voltage is not necessarilly exactly 5V, but it can be also insufficiently filtered because of using low quality capacitors rapidly losing their capacity over time.

Turning off HRM doesn't help. I think that battery is damaged. I hope Garmin will repair this. Till now they didn't answer.

About charging. Some of You are writing about 1W charging power. Since I remember usb chargers it was 5V and 500mA (2.5W).

Even QC3.0 charger is not able to fast charge device which don't have USB-C. 

The Instinct has not quick or slow charging. Give it 5V and it will charge by dedicated speed. The speed (=current) is controlled by its electronics, so I suppose that even with higher voltage the speed would not be different. So if you would connect the watch to higher voltage than 5V, the watch could probably survive it, but there is no reason to do it.
 You forced me to measure the current during charging. Battery voltage 3.87 V, i.e. 12%, charging current 180mA from computer, 180mA - no surprise - from the charger (rated to 650mA).
5V in both cases, of course. The higher voltage I did not try, I'm sorry  .

So the statement of Garmin-Chris quoted higher give me no sense...

Thank You for this test. It means Instinct has internal current regulator and Garmin recommendations sometimes are overly secure.

My battery is dead with no reason. Was it happens to somebody before?

6619804 said:

The higher voltage I did not try, I'm sorry
So the statement of Garmin-Chris quoted higher give me no sense..

I'd tell the higher voltage (that you did not test) and insufficient AC-fraction filtering at lowcost chargers and car adapters may be the reasons. A miniaturized device, like the watch, for obvious reasons cannot use any capacitors of sufficient capacity to cope with some extreme deviations that may appear with some crappy lowcost chargers or adapters.

BTW, how do you get this screen with charging details on Instinct?

trux said:

insufficient AC-fraction filtering at lowcost chargers

In theory, yes. But I do not think this is often situation, especially when the charger is loaded only by 180mA.

trux said:

how do you get this screen

Test mode, see https://www.youtube.com/watch?v=70No78Zufuw

(Looks different now with 6.60 firmware)

6619804 said:

especially when the charger is loaded only by 180mA

It is not a question of the charging current, rather a question of overvoltage and AC peaks. Those are indeed quite a problem at lowcost chargers, especially if they already have some age, since they very often use capacitors of low quality, leaking the electrolyte over time (drying out), and hence losing the capacity. It then leads to deviations in voltage, and to high peaks in AC spectrum. It may not pose any significant problems when charging bigger devices, like phones, since both the accumulators and the electronics of the device can handle it, but maximally miniaturized devices like the watches may have problems coping with it.