Except that 13 volts is too low for cyclic use. The lower voltage is intended for standby use. At least another volt higher will get you a fuller charge.? Each manufacturer has their own max charging current spec. The Power Sonic one sitting in front of me as I type has the information printed directly on the case.
Standby use 13.6 V
Cyclic use 14.4 - 15.0 V
Initial current limit 2.1 A
? ?I personally use 14.4 V. Charging current normally doesn't reach the max spec unless I've discharged deeper than usual. I once saw a brand specs at 1.8 A, but that was years ago of some namea I don't recollect. Been using these things for decades counting work applications. That's what has always worked well.
Joe N1KHB?
On Tue, Oct 8, 2024 at 4:26 PM, G0FTD via groups.io
<andyfoad@...> wrote:
On Mon, Oct 7, 2024 at 10:02 PM, Joseph Wonoski wrote:
? Although I remain a Yaesu fan, I view the internal battery compartment feature as a fundamental failure along with the internal charging control. I use the space for spare fuses and such.
Hi Joe,
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I agree it was a failure.
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I wanted to use the space for 18650's, but it was a millimeter too small in each dimension.
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But Martin admin says he's printed a cell pack and got it working.
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I wonder if it's down to the cell protection that adds the extra length that spoils it.
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Non protected cells are a tiny bit shorter.
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Just a few extra millimeters in the cell pack area would have made all the difference, grrr.
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But that has to be tempered with the fact that these 18650's are only really 2500-3000mah
max, so I guess even if we could have fitted them then operating time was at least in
my opinion just a bit too short for my liking, so it was back to a 7ah gel cell.
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Cheap, easy to charge , just supply with 13v current limited to about 700ma as we have both agreed.
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73 de Andy
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