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Author Topic: Bioenno 12V Battery and Yaesu FT-70DR  (Read 331 times)

K1KIM

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Bioenno 12V Battery and Yaesu FT-70DR
« on: January 09, 2022, 10:02:48 AM »

Has anyone had any experiences, either good or bad, using the 12vdc  4 amp Bioenno battery adapted to a 4.5mm plug to charge and operate their Yaesu HT?

My concern is that the wall wart charger is 10.5 vdc output and the battery is 12vdc. The battery pack that goes on the radio is 7.4 vdc.

Is that just a bit too high, or am I ok at the 12vdc?

I have seen a number of articles/videos on using the 12v Bioenno batteries, but have concerns.
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WA2EIO

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Re: Bioenno 12V Battery and Yaesu FT-70DR
« Reply #1 on: January 09, 2022, 10:59:21 AM »

Doesn't Yaesu make an adapter to run their HTs off the accessory socket (AKA cigarette lighter) on a car?  Connecting that to the Bioenno would work.
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WB6BYU

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Re: Bioenno 12V Battery and Yaesu FT-70DR
« Reply #2 on: January 09, 2022, 12:38:16 PM »

What does the radio manual say for the maximum input voltage?

K1KIM

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Re: Bioenno 12V Battery and Yaesu FT-70DR
« Reply #3 on: January 09, 2022, 12:47:06 PM »

What does the radio manual say for the maximum input voltage?

As per the specs I read before posting.

     Nominal             7.4
     Operating          6-14 negative gnd (battery connect)
                           11-16 negative gnd (external dc jack, charging)

It would appear that 12 vdc would not be a problem, however the word nominal always causes me doubt.

I always worry ::) ::)
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WB6BYU

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Re: Bioenno 12V Battery and Yaesu FT-70DR
« Reply #4 on: January 09, 2022, 04:06:35 PM »

Quote from: K1KIM

     Nominal             7.4
     Operating          6-14 negative gnd (battery connect)
                           11-16 negative gnd (external dc jack, charging)




So as I interpret that:

Nominal voltage of the internal battery is 7.4V

You can apply 6 to 14V to the input terminals from the battery,
and the rig will still operate correctly.

You can plug a source of 11 - 16V to the DC input jack to charge
the battery and operate the radio on external DC.  (Likely with a
built-in regulator to charge the battery.)

So you could make an adaptor and run the radio straight off the
Bioenno battery rather than the internal one (assuming that the
maximum voltage of the Bioenno was less than 14V). 

Applying 12V to the external DC connector shouldn't be a problem
for running the radio, charging the battery, or both.
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