Re: Got 4Ah, not 5Ah, battery 18V (20V) - done right thing?

On 5/17/2024 2:48 PM, Bob La Londe wrote:

On 5/17/2024 2:41 PM, Jim Wilkins wrote:

"Bob La Londe"  wrote in message news:v28e5m$2btdu$1@dont-email.me...
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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.
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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.
 

I should note that there have been reports of some tools being smoked by running harder with the uber battery packs like the DeWalt 20/60 that delivers 20V and lots of capacity or 60V and less capacity depending on what tool its plugged in to.
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Bob La Londe
CNC Molds N Stuff
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