OUDIE N CHARGE RATE

[miltonpilot JLH]

I used my Oudie N until the available battery charge was down to 65%. Then I put it on charge, using the charger and cable that came with it. After a little over 3 hours on charge the battery level is only up to 90%. Is it normal for it to charge this slow?

[John Noss]

After the latest software/firmware updates, my Oudie N overheated and shut down inflight (above freezing level), and also took many hours to recharge.  Never had a problem before.

John Noss
john...@gmail.com
(703) 919-4354  (cell)

On Wed, May 28, 2025, 18:11 miltonpilot JLH <milton...@gmail.com> wrote:

I used my Oudie N until the available battery charge was down to 65%. Then I put it on charge, using the charger and cable that came with it. After a little over 3 hours on charge the battery level is only up to 90%. Is it normal for it to charge this slow?

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[David Cleveland]

I've had some slow charges. Today I started the  charge at 52% and it took 2.5 hrs. It could depend on your charger. 

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[David Cleveland]

Thanks. I won't update.

DC

On Wed, May 28, 2025, 4:42 PM John Noss <john...@gmail.com> wrote:

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[Eric Greenwell]

Have you contacted Naviter? It's really, really, unlikely they'd make such a mistake. Or, reload the latest non-beta version, and try again.

Eric

On 5/28/2025 5:22 PM, David Cleveland wrote:

Thanks. I won't update.

DC

,

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[Kevin Anderson]

Not having charging problems at present, but at the rate you were talking about 65 - 90 in 3 hours does not seem slow to me for such a big battery.  

Also, not charging all the way to 100 percent  will help preserve the battery.  

Thanks to  Rich Sheppe, I bought a manual countdown charger for my N so I can limit the amount I charge.  It takes some trial and effort to figure out how to not get it all way up to 100%.

https://www.amazon.com/dp/B00MVDTEXS?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1

Kevin

[Rick Sheppe]

I try to keep the battery in the "mid-charge" range, 15% - 85%.  In that range, it seems to charge at about 15% per hour.

I have never tried to take it to 100%, but I plan to do that every 10 charges or so, in order to prevent the battery from forgetting what a full charge is.  I would then use the instrument right away, not storing it with a full charge.

-Rick

[Eric Greenwell]

If you do that - only charge it fully the morning of the flight - I think there will be no measurable loss of life. I say that because it will be at 100% for only a few hours before you start flying with it, and it will happen only 30 or so times a year. That's a lot less than the 365 times a year a cell phone would have.

Eric

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[moshe....@gmail.com]

The rate of charge of any device with a lithium battery is the minimum of two independent things:

* How much current (*) the charger (AC adapter) is able to provide, and

* How much current the charge controller inside the device is willing to accept.

Most people seem to want everything charged as fast as possible.  So the manufacturers of, e.g., cellphones, oblige.  But I believe it is better for the battery's longevity to charge it slower, over at least several hours.  You can force that by using an old USB power adapter, the early ones were limited to around 0.5A, others to 1A or so.  With a slow charger, it is also easier to manually stop the charge before the battery is full.  Easier in the sense of having a better chance of remembering to check it (wider window of time).  E.g., a 0.5A charger would take 10 hours (**) to charge a 5AH battery.  My plug-in hybrid car takes 10 hours to charge (from empty to full) off a standard 115V outlet, good for the health of the big expensive battery, and I can easily stop it halfway.  Why bother with a fancier charger?

*) the fancy fast chargers nowadays also adjust the voltage, it can be more than ye olde 5 volts, e.g., 9V.  A higher voltage allows higher power for the same current.  The voltage is decided upon by a negotiation between the charger and the charged.  If either is too dumb to play the game, it defaults to 5V.  In any case the voltage is converted inside the device to the voltage of the battery, which is about 4V for a single-cell lithium polymer battery.

**) not quite, as they specify the battery capacity at its voltage.  The 0.5A at 5V (2.5 watts) is converted to about 0.6A at 4V (same watts, minus some inefficiency in the conversion).

[moshe....@gmail.com]

This device may be cool although a bit pricey:     https://chargie.org/

You can program it to stop the charging before full.

There may be others like it, but I have not found any so far.

Modern cell phones have a setting to limit the charging to 85% or so.  Not the Oudie N?

[Eric Greenwell]

It may be the Oudie N is designed to provide a long battery life, even if the battery is routinely charged to 100%. This could be achieved by, for example, setting the battery charge limits at 10% and 80%, while the displayed percentage would be 0% to 100%. It could also control the charge rate based on battery temperature and where it is in the charge cycle.

I suggest someone interested in optimizing their use of the Oudie N battery ask Naviter about the "best practices", as I don't find anything on their website about it.

Eric