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From: Bob La Londe <none@none.com99>
Newsgroups: rec.crafts.metalworking
Subject: Re: Got 4Ah, not 5Ah, battery 18V (20V) - done right thing?
Date: Fri, 17 May 2024 14:48:51 -0700
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On 5/17/2024 2:41 PM, Jim Wilkins wrote:
> "Bob La Londe"  wrote in message news:v28e5m$2btdu$1@dont-email.me...
> 
> I found in a lot of cordless tools the higher amp hour rated battery the
> better.  Generally I have not noted it for light load tools like a
> cordless drill using small bits, but things like electric chainsaw,
> angle grinder, etc it was very noticeable.  I do not mean just that the
> bigger AH rating ran longer.  I mean it delivered more current in a
> short fixed time period.  The tool performed better.  I've experienced
> this with relatively cheap lines like Harbor Freights Bauer line and
> with better pro and pro-sumer cordless tools like Milwaukee and DeWalt.
> If you follow the YouTube channel "The Torque Test Channel" they mirror
> this result with more subjective data across a range of tools including
> drills and impact wrenches.
> 
> ----------------------------
> 
> Interesting. My high powered tools are corded and I don't have recent 
> experience with new battery tools, or much else that's new, I just 
> prepped a 37 year old garden tractor for summer. Maybe the higher Ah 
> packs are newer tech that performs better. Lithium batteries are still 
> evolving.
> https://www.joules-solar.com/articles/lto-vs-lifepo4-chemistry
> 


I think its more likely adjustment of the internal BMS depending on how 
the larger battery is configured to make it larger.  For instance if it 
has an extra bank of cells it can 100% certainly deliver more current. 
Just like tying two car batteries in parallel gives you more current 
capacity.  I expect larger cells might also be capable of more current 
if the conductors are sized accordingly.

-- 
Bob La Londe
CNC Molds N Stuff


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