18v C cell?

onsdag den 1. september 2021 kl. 04.22.08 UTC+2 skrev Carl:
> On 8/31/21 5:39 PM, Lasse Langwadt Christensen wrote: 
> > tirsdag den 31. august 2021 kl. 23.22.14 UTC+2 skrev Tabby: 
> >> On Tuesday, 31 August 2021 at 14:39:26 UTC+1, Ralph Mowery wrote: 
> >>> In article <0c1be23f-b5fa-4caa...@googlegroups.com>, 
> >>>> On Tuesday, 31 August 2021 at 01:54:20 UTC+1, Mike Perkins wrote: 
> >>>>> On 31/08/2021 01:09, Tabby wrote: 
> >>>>>> Is there an 18v battery about the size of a C cell? A zener tester, probably 1970s, that goes upto 17v max, takes what looks like a single C cell. There is no circuitry that could up the v as far as I can tell. 
> >>>>> https://en.wikipedia.org/wiki/List_of_battery_sizes 
> >>>>> 
> >>>>> Lookup A412 - 22.5V. I think this was a size used in some AVOs. 
> >>>>> 
> >>>>> HTH 
> >>>> 
> >>>> Yes, cheers. I guess 3x PP3 might be a better option now. 
> >>>> 
> >>>> 
> >>> I have a few pieces of older gear that takes batteries that are no 
> >>> longer on the market. If there is room I use a 9 volt battery and one 
> >>> of the boost converters from China. You can get them to boost or lower 
> >>> (buck) the voltage. 
> >> I was just wondering about that, but with a 1.5v cell. 9v batteries are a lot more bucks per watthour. 
> > 
> > https://www.banggood.com/Geekcreit-3_7V-9V-5V-2A-Adjustable-Step-Up-18650-Lithium-Battery-Charging-Discharge-Integrated-Module-p-1264852.html 
> > 
> > and a LiPo battery 
> >
> That has a minimum input of 5V so a single 3.7V Li isn't going to do. 

it is literally designed for a single 3.7V Li, the 4.5-8V input is for the charger 

On 9/1/21 4:58 AM, Lasse Langwadt Christensen wrote:
> onsdag den 1. september 2021 kl. 04.22.08 UTC+2 skrev Carl:
>> On 8/31/21 5:39 PM, Lasse Langwadt Christensen wrote:
>>> tirsdag den 31. august 2021 kl. 23.22.14 UTC+2 skrev Tabby:
>>>> On Tuesday, 31 August 2021 at 14:39:26 UTC+1, Ralph Mowery wrote:
>>>>> In article <0c1be23f-b5fa-4caa...@googlegroups.com>,
>>>>>> On Tuesday, 31 August 2021 at 01:54:20 UTC+1, Mike Perkins wrote:
>>>>>>> On 31/08/2021 01:09, Tabby wrote:
>>>>>>>> Is there an 18v battery about the size of a C cell? A zener tester, probably 1970s, that goes upto 17v max, takes what looks like a single C cell. There is no circuitry that could up the v as far as I can tell.
>>>>>>> https://en.wikipedia.org/wiki/List_of_battery_sizes
>>>>>>>
>>>>>>> Lookup A412 - 22.5V. I think this was a size used in some AVOs.
>>>>>>>
>>>>>>> HTH
>>>>>>
>>>>>> Yes, cheers. I guess 3x PP3 might be a better option now.
>>>>>>
>>>>>>
>>>>> I have a few pieces of older gear that takes batteries that are no
>>>>> longer on the market. If there is room I use a 9 volt battery and one
>>>>> of the boost converters from China. You can get them to boost or lower
>>>>> (buck) the voltage.
>>>> I was just wondering about that, but with a 1.5v cell. 9v batteries are a lot more bucks per watthour.
>>>
>>> https://www.banggood.com/Geekcreit-3_7V-9V-5V-2A-Adjustable-Step-Up-18650-Lithium-Battery-Charging-Discharge-Integrated-Module-p-1264852.html
>>>
>>> and a LiPo battery
>>>
>> That has a minimum input of 5V so a single 3.7V Li isn't going to do.
> 
> it is literally designed for a single 3.7V Li, the 4.5-8V input is for the charger
> 

Sigh, you are right of course.

-- 
Regards,
Carl Ijames