Charging Lithium Ion batteries (KX2) from Car

[Yngvi (TF3Y)]

Hi folks.

Just wondering how you go about charging the Elecraft supplied Lithium Ion
batteries for the KX2 from a car (13.8V) supply?

Are there recommended chargers for this? The Tenergy charger supplied by
Elecraft runs from 100-240V range.

Thanks,
Yngvi TF3Y
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[Bob N3MNT]

You can purchase a small Inverter ( probably least expensive) or Tenergy
makes 12VDc powered chargers.



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[Mike Furrey]

I am not sure what kind (size, shape) of Li batteries are in the KX2 but as a caver I use 18650 Li batteries in my lights. I have found the Nitecore D4 intelligent charger that works on both 120 VAC and 13 VDC that does a good job of charging a variety of Li and Ni-cad batteries either at home or one the road.
73, Mike WA5POK
 

    On Sunday, April 15, 2018 10:06 AM, Yngvi (TF3Y) <[hidden email]> wrote:
 

 Hi folks.

Just wondering how you go about charging the Elecraft supplied Lithium Ion
batteries for the KX2 from a car (13.8V) supply?

Are there recommended chargers for this? The Tenergy charger supplied by
Elecraft runs from 100-240V range.

Thanks,
Yngvi TF3Y
--
http://www.tf3y.net
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[Yngvi (TF3Y)]

For further clarification: The Lithium Ion battery packs supplied by
Elecraft are 11.1v, 2.6Ah.
I think the Tenergy charger supplied by Elecraft charges at 2000mA

73, Yngvi TF3Y

On Sun, Apr 15, 2018 at 2:51 PM, Mike Furrey <[hidden email]> wrote:

> I am not sure what kind (size, shape) of Li batteries are in the KX2 but
> as a caver I use 18650 Li batteries in my lights. I have found the Nitecore
> D4 intelligent charger that works on both 120 VAC and 13 VDC that does a
> good job of charging a variety of Li and Ni-cad batteries either at home or
> one the road.
>
> 73, Mike WA5POK
>
>
> On Sunday, April 15, 2018 10:06 AM, Yngvi (TF3Y) <[hidden email]> wrote:
>
>
> Hi folks.
>
> Just wondering how you go about charging the Elecraft supplied Lithium Ion
> batteries for the KX2 from a car (13.8V) supply?
>
> Are there recommended chargers for this? The Tenergy charger supplied by
> Elecraft runs from 100-240V range.
>
> Thanks,
> Yngvi TF3Y
> --
> http://www.tf3y.net
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>
>
>

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[Jim Brown-10]

On 4/15/2018 7:04 AM, Yngvi (TF3Y) wrote:
> Are there recommended chargers for this? The Tenergy charger supplied by
> Elecraft runs from 100-240V range.

If you don't mind the RF noise they produce, a small DC-AC inverter can
be a good solution. Slides 213-214 in
http://k9yc.com/KillingRXNoiseVisalia.pdf show a small one that I bought
to run a laptop in W6GJB's truck for mobile contesting.  This is the
smallest model in their Pure Sine Wave series, and it's much quieter
than larger models in the same series, which are too noisy use close to
antennas.

For others who suggested other DC chargers -- all forms of Li batteries
can easily be damaged if not charged per their design specs. Unless you
know those specs and can be certain to conform to them, stick with the
"official" charger.

73, Jim K9YC
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[Yngvi (TF3Y)]

Thanks Jim.

I'll take a look at that one. I wasn't thinking about mobile operating but
the KX2 would run directly off  the car battery.
Rather, I was thinking of what my possibilities were when I spend days away
from an AC outlet..The Samlex inverter you show in your presentation
clearly needs a LOT of additional filtering for your setup!

Perhaps the folks at Elecraft have a good pointer.I think a mobile charger
might be a good addition form some of us.

73, Yngvi TF3Y

On Sun, Apr 15, 2018 at 8:18 PM, Jim Brown <[hidden email]>
wrote:

> On 4/15/2018 7:04 AM, Yngvi (TF3Y) wrote:
>
>> Are there recommended chargers for this? The Tenergy charger supplied by
>> Elecraft runs from 100-240V range.
>>
>
> If you don't mind the RF noise they produce, a small DC-AC inverter can be
> a good solution. Slides 213-214 in http://k9yc.com/KillingRXNoise
> Visalia.pdf show a small one that I bought to run a laptop in W6GJB's
> truck for mobile contesting.  This is the smallest model in their Pure Sine
> Wave series, and it's much quieter than larger models in the same series,
> which are too noisy use close to antennas.
>
> For others who suggested other DC chargers -- all forms of Li batteries
> can easily be damaged if not charged per their design specs. Unless you
> know those specs and can be certain to conform to them, stick with the
> "official" charger.
>
> 73, Jim K9YC
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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[Jim Brown-10]

The filtering is not needed if you're not operating while it's running. :)

73, Jim

On 4/15/2018 2:26 PM, Yngvi (TF3Y) wrote:
> Thanks Jim.
>
> I'll take a look at that one. I wasn't thinking about mobile operating but
> the KX2 would run directly off  the car battery.
> Rather, I was thinking of what my possibilities were when I spend days away
> from an AC outlet..The Samlex inverter you show in your presentation
> clearly needs a LOT of additional filtering for your setup!

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