kX3 and L ion battery

[Phillip Lontz]

If I install l ion batteries in the KX3 the total volts will be about 15.2 plus or minus... So what is the absolute Vmax for the KX3?

Phil
K5SSR
Santa Fe

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["Hjalmar Duklæt"]

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[Phillip Lontz]

Ah Yes thats what I needed to know....
Thank You.






On Sep 15, 2012, at 11:47 PM, "Hjalmar Duklæt" <[hidden email]> wrote:

15.0V is max. At 15.1V the KX3 goes dead due to protection.

73 de Hasl
LA4XX

On 12-09-15, Phil Townsend <[hidden email]> wrote:

> If I install l ion batteries in the KX3 the total volts will be about 15.2 plus or minus... So what is the absolute Vmax for the KX3?
>
> Phil
> K5SSR
> Santa Fe
>
> Sent from my iPad
> ______________________________________________________________
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[Bill Frantz]

Sounds like a series diode will drop the voltage to within range.

Cheers - Bill, AE6JV

On 9/16/12 at 0:07, [hidden email] (Phil Townsend) wrote:

> Ah Yes thats what I needed to know....
> Thank You.
>
>
>
>
>
>
> On Sep 15, 2012, at 11:47 PM, "Hjalmar Duklæt" <[hidden email]> wrote:
>
> 15.0V is max. At 15.1V the KX3 goes dead due to protection.
>
> 73 de Hasl
> LA4XX
>
> On 12-09-15, Phil Townsend <[hidden email]> wrote:
> > If I install l ion batteries in the KX3 the total volts will be about 15.2 plus or minus... So
> what is the absolute Vmax for the KX3?
> >
> > Phil
> > K5SSR
> > Santa Fe
> >
> > Sent from my iPad
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
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> >
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>
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[Ignacy]

The regular Li-Ion charge to 4.2V per cell so it is 12.6V max for 3 and 16.8V for 4. I use 12.6V but get full power only for the first 30% of charge. May be a bit better if a series diode in KX3 is removed that adds about 0.6V drop. One can charge the 4 cell Li-Ion battery to 15V only, for less charge. There may still be weight gains compared to LiFePO3.
Ignacy

[Phillip Lontz]

Charging Lion batteries to only about 90 percent of capacity will help to extend the life of same. Likewise do not totally discharge Lions. Unlike nicads.
Nicads like to be stored in a discharged state. Lion like to be stored in a charged state.

Phil
Santa Fe
k5SSR


Sent from my iPad

On Sep 17, 2012, at 7:44 AM, Ignacy <[hidden email]> wrote:

> The regular Li-Ion charge to 4.2V per cell so it is 12.6V max for 3 and 16.8V
> for 4. I use 12.6V but get full power only for the first 30% of charge. May
> be a bit better if a series diode in KX3 is removed that adds about 0.6V
> drop. One can charge the 4 cell Li-Ion battery to 15V only, for less charge.
> There may still be weight gains compared to LiFePO3.
> Ignacy
>
>
>
> --
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