K2 Battery Alternative?

[Deni F5VJC]

I have some 3 cell LiPo batteries normally used for RC aero models and I'd
like to try these externally with my K2. The batteries are 3.7V per cell
500mAH which will give 11.21 V fully charged.
I do of course have a suitable charger for LiPo batteries.

How will the K2 perform at this reduced voltage? Opinions please.

73, Denis F5VJC
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[Deni F5VJC]

Correction the battery capacity is 5000mAH or 5AH of course.

73, F5VJC

On 27 February 2017 at 11:09, F5vjc <[hidden email]> wrote:

> I have some 3 cell LiPo batteries normally used for RC aero models and I'd
> like to try these externally with my K2. The batteries are 3.7V per cell
> 500mAH which will give 11.21 V fully charged.
> I do of course have a suitable charger for LiPo batteries.
>
> How will the K2 perform at this reduced voltage? Opinions please.
>
> 73, Denis F5VJC
>
>

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[Elecraft mailing list]

The Manual says it will run on 9-15 v
So I would say try it and see.




      From: F5vjc <[hidden email]>
 To: Elecraft Reflector <[hidden email]>
 Sent: Monday, February 27, 2017 5:09 AM
 Subject: [Elecraft] K2 Battery Alternative?
   
I have some 3 cell LiPo batteries normally used for RC aero models and I'd
like to try these externally with my K2. The batteries are 3.7V per cell
500mAH which will give 11.21 V fully charged.
I do of course have a suitable charger for LiPo batteries.

How will the K2 perform at this reduced voltage? Opinions please.

73, Denis F5VJC
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[Don Wilhelm]

Deni,

It should work fine, especially if you keep the power to 5 watts or
under.  Set the CAL CUR parameter at 3.50 Amps to avoid HI CUR warnings.

If you try to run at 10 watts, the IMD will be reduced and the current
draw will be excessive.

Remember that the K2 tries to produce the power requested by the POWER
knob, and in order to maintain that power at reduced voltage, the
current must increase.

73,
Don W3FPR

On 2/27/2017 5:09 AM, F5vjc wrote:
> I have some 3 cell LiPo batteries normally used for RC aero models and I'd
> like to try these externally with my K2. The batteries are 3.7V per cell
> 500mAH which will give 11.21 V fully charged.
> I do of course have a suitable charger for LiPo batteries.
>
> How will the K2 perform at this reduced voltage? Opinions please.
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[EricJ-2]

I ran my K2/10 and K1 from my RC batteries for years. Mine were only 2000mAH. When they started sagging for RC, I used them for the radios where peak current draw was dramatically lower. I ran the rigs at 5 watts as Don mentioned. The signal was clean and at that power level they would barely tax the batteries over an entire weekend in the field.

Eric

KE6US

On 2/27/2017 2:09 AM, F5vjc wrote:

I have some 3 cell LiPo batteries normally used for RC aero models and I'd
like to try these externally with my K2. The batteries are 3.7V per cell
500mAH which will give 11.21 V fully charged.
I do of course have a suitable charger for LiPo batteries.

How will the K2 perform at this reduced voltage? Opinions please.

73, Denis F5VJC
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