03-17-2023, 08:37 PM
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.
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.
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