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FLEX STACKED LITHIUM Starter Kit 24-V Lithium-ion Battery and Charger - free tool with purchase - $199

$199.00
+4 Deal Score
1,608 Views
Buy a battery and choose a free tool to go with it. They have 9 different tools available.

https://www.lowes.com/pd/FLEX-24-...5014208987
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Created 05-02-2024 at 12:15 PM by factory81
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Joined Apr 2004
"Hella"-NorCal thing!
> bubble2 505 Posts
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SjsuGuy
05-02-2024 at 12:20 PM.
05-02-2024 at 12:20 PM.
Is battery compatibility fatigue a thing? Because I'm there.

If anyone is interested, I believe the Flex line is by EGO. I am not sure if any other batteries from another mfg work with these tools. Closest I would imagine would be a Dewalt 24v or Kobalt 24v but haven't researched it.
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Joined Feb 2024
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> bubble2 17 Posts
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Mr.Fry
05-02-2024 at 05:16 PM.
05-02-2024 at 05:16 PM.
Flex is a 100+ year old German brand (red) and is owned by Chervon and is regarded on par or above to dewalt and Makita when it comes to power and build quality with their OG red line in Europe. They had an issues with one line of 24v batteries but have since resolved that. The brand name took a bit of a hit tho. The black 24v line is offered in North America. Chevron owns (part of the list), ego, flex, kobalt, skil.
Battery fatigue is only real if the batteries are expensive 🤣
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Joined Nov 2020
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> bubble2 68 Posts
SplendidSofa5250
05-03-2024 at 08:16 AM.
05-03-2024 at 08:16 AM.
Quote from SjsuGuy :
Is battery compatibility fatigue a thing? Because I'm there.

If anyone is interested, I believe the Flex line is by EGO. I am not sure if any other batteries from another mfg work with these tools. Closest I would imagine would be a Dewalt 24v or Kobalt 24v but haven't researched it.
There aren't any adapters for it. Kobalt batteries will not work/fit on Flex from the research I did.

There are adapters on etsy for Flex batteries to milwaukee/makita etc but not the other way around.
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Joined Nov 2020
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> bubble2 68 Posts
SplendidSofa5250
05-03-2024 at 08:16 AM.
05-03-2024 at 08:16 AM.
The battery is the 3.5AH lithium
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Joined Feb 2024
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> bubble2 17 Posts
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Mr.Fry
05-03-2024 at 06:07 PM.
05-03-2024 at 06:07 PM.
Not that bad of a deal when paired with their router. 2 months ago they ran the opposite throwing in free batteries with some of their tools
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Last edited by Mr.Fry May 3, 2024 at 07:57 PM.
Joined Apr 2010
L7: Teacher
> bubble2 2,192 Posts
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FatFaluz
05-04-2024 at 06:39 AM.
05-04-2024 at 06:39 AM.
Quote from SplendidSofa5250 :
There aren't any adapters for it. Kobalt batteries will not work/fit on Flex from the research I did.

There are adapters on etsy for Flex batteries to milwaukee/makita etc but not the other way around.
Using the 6-cell (21.6V / 24Vmax / 25.2V actual max) Flex batteries on tools designed for 5-cell (18V / 20Vmax / 21.0V actual max) is a bit risky, though I suspect most tools are over-engineered for some overage.

Most power tool brands use 5 Li-Ion cell in series to obtain 18V (aka 20Vmax), with a few brands using 6 cells for 21.6V (or 22V, or 24Vmax). 18V has historically been the mainstream voltage from the NiCd days (15x 1.2V cells) and the norm carried over for most brands, sometimes for backward compatibility with old NiCd tools (the early Milwaukee V18 (not M18) and DeWALT LX/EX (not 20Vmax), Ryobi/Ridgid/Kobalt 18V for instance). The compactness of Li cells allow a few brands (especially newcomers and also-rans) to introduce 6-cell systems to differentiate themselves from the mainstream.

The 6-cell brands I know of are [1] Kobalt (they used to have 18V NiCd > 18V Li-Ion, soon renamed 20Vmax tool, then introduced the non-backward-compatible 24Vmax system in 2016 and gradually discontinued the old series. I remember they bragged that their 24Vmax battery had the same footprint as the old 18V/20V series). [2] Greenworks (their 24Vmax replaced the discontinued, decade+ old 20Vmax), [3] Sun Joe (24Vmax replaced 20Vmax again) and [4] Hilti whose 22V batteries released in 2016 work with both 18V and 22V tools because their 18V tools were (over-)designed with 22V in mind, intentionally or not.

These 6-cell batteries would make good, direct substitute (with adapter) for 6-cell cordless vacuum batteries (primarily Dyson V6 V7 V8), since a fully charge 5-cell battery (say, a Milwaukee/DeWALT 18V/20V) would appear half-full to a 6-cell tool/vacuum and would shut off well before the 5-cell battery is actually depleted (so a 4.0Ah battery would have the run time of a Dyson battery with around 2.0Ah). A 6-cell battery makes an acceptable substitute for a 7-cell vacuum (Dyson V10 V11 V12 V15), while such vacuum would see a fully charged 5-cell battery (near 21.0V) as pretty much depleted (vacuum see 21.0V / 7 = 3.0V remaining per cell) explaining the poor reviews of those Dyson V10-V15 direct-connect battery adapters (with no voltage converter, which are expensive to implement).

As for battery adapters with a built-in voltage converter (like those 40V battery to Dyson adapter)? They are a different (and probably nastier) can of worms.
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Last edited by FatFaluz May 4, 2024 at 07:10 AM.
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