Ridgid drill/driver kit with 2, 2.0AH batteries

[sternwake]

The Ridgid angle grinder and dual 4.0 ah battery packs arrived.

One battery read 2 bars, The other just 1, but both were in the 17.36 to 17.38v zone.

The max charge rate with either charger was 2.0 amps..
Both batteries warm off the charger, read 20.38v.

20.38/5= 4.08v
Full ocv of an 18650 cell is 4.2v.

So it looks like Ridgid is charging the cells to low to mid 90% range, saCrificing some run time for increased cell life.

Ive not.run a tool until the LVD kicks in, but need to establish that number.

My Makitas would allow.me.to overdischarge, they just had a instruction to recharge as soon as it was obvious tool was slowing.

Looks.like Rdgid had an ' Octane' series of batteries, but only the 3.0 Ah version used 21700 cells.

Of The latest line of batteries, the 'MAX' offerings, apparently only the 8.0 AH version uses 21700 cells. They want 200$ for it.

If not.really given the angle grinder a go yet. Feels solid, nice grips,.signifiicantly quieter than harbor Fright 120vac corded grinder, but 2k less rpm.too.

Wish it had a dial for speed control.

I can tell that the drill has more.power with the 4.0 Ah battery.
Same RATED voltage, but twice as many individual cells to maintain higher voltage under high loads, and power lesser loads, for 2x as long.

[sternwake]

According to youtube, the 4.0 ah regular battery packs employs 10 of.these cells
EVE ICR 20P



https://www.18650batterystore.com/products/eve-20p


The 2.0 AH normal (not the 'max) battery which came with the drill driver kit employs 5 of these cells.

LiSTEN LS LR1865LA

https://www.ancoo-battery.com/en/product/LR1865LA.html

Both cells are 2000mah capacity and max of 30 amp.discharge rate.

There are 3000mah 30 amp max 18650 cells available.

Wonder when I'll get a battery spot welder, start making my own.

[rvpopeye]

I've thought about making my own by experimenting with big capacitors........
I hereby turn this idea over to YARC R&D department head .
Have fun with it..

[sternwake]

Not sure how the benefits of capcitors could be used in a power tool batttery.

Pe4haps the 1/2 impact drivers designed to get lug nuts off 18 wheelers.

Torque test channel shows some neat tests with those, and how the bTtery used has a xi4ect effect on the torque measured.

My new drill and driver is the brushed motor line. They have 2 brushl3ss offerings which are more powerful, especially when paired with the higher $ batteries, so they claim.

I think the most intensive torquish task I will ask of my drill is pocket screws in hardwood, with a dull bit, but i have a 120vac corded Makita drill which excels at that task, and portability not an issue in that task.

I've recently experimented with pocketscrews in 1.5 inch PVC pipe, and am seriously impressed with how well just 2 screws secure it. One screw really, but one can rotate the pipe with just one. 2 it is locked, tight and amazingly strong.

[sternwake]

Achieving a 90' standoff usually required boring a hole just large enough, but not too large.  And a drill press to keep it perpindicular for the important stuff.

[rvpopeye]

When you short out a charged capacitor , it completely discharges in an instant.
If it's big enough , it welds. Just never messed with it to see how big for spot welding batteries..
I had a couple of Wahl Isotip battery powered solder irons back in the 80s the battery had spot welded tabs to solder the wires to I had one broken off . I ended up getting a new one , didn't have the time out on the road. I also remember something about a charged automotive ignition coil...

[sternwake]

Ahh. Super caps for the welder.

There's a couple DIy battery spot welders on youtube... one repurposes a transformer from a microwave.

With a welder buying all new higher end 18650 cells and reusing the BMS, could yield a far better battery,.at a fraction of the cost.
This cell x 5 for 18v nominal. 2.8 Ah, 35 amp.
20$ + shipping.

https://www.18650batterystore.com/products/molicel-p28a

[rvpopeye]

Micro transformer hmmmmmmmm !

I was thinking of upgrading the batts in my old makita 12v (ni-cad?) drill. Been using it with a long wire clipped to the battery in the truck .

[sternwake]

I think those old makitas used C sized nicad cells.

https://www.amazon.com/gp/aw/d/B01BPHQM3..._2?ie=UTF8&psc=1&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9kZXRhaWwp13NParams

Ive run 10 awg wires And Anderson Powerpoles to a 19v porter cable drill. Still plenty of power, at 12.6v, but @ 25.2v the thing was a torque and rpm monster. Great for a cupped wire wheel, could really lean into it, send rust dust flying, get more use from the drill, save my 9.6v craftsman.

I'm still not used to the trigger on the ridgid drill. Im used to changing bits quickly and the delayed trigger has me burning the hand holding the spin chuck. Gotta relearn 30 years of habit.

Fairly sure the Ridgid drill on speed 2 is a few to Several hundred more rpm than my Makita was.

[Scott7022]

My only experience with capacitors was in the early 90’s when we ordered two from west Germany. Each was 1.5 farads and meant to back up the amplifier power during loud heavy usage. So the theory was and as it turned out correct. However no one had used them in this 13.5 volt car audio capacity. So when I first hooked it up and dumped the hot lead on the thing it exploded into a fancy fairy silver streamers flying about and me needing new underwear. We used a resistor to slowly charge the second one and it went inline with the sub amp power line and voila no power drops or dimming headlights.


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