pack, $12 Samsung 2600, on the way. The Samsung and my 2004!!–2008 Sony pulls rock.
These are NOS packs and will never waste time with used packs which can deplete life an average of 6% a year, as the very laptop I’m typing on. My older Gateway 6831XF sucked 20% out first year with much deeper recharge cycles.
I see that there are a lot of better analyzing chargers being used. We should add (1) 3A discharge test for those of us using single cell lights with 3 amp Qlite drivers. This will be the shared current on my 4 led SRK using the 11.2 amp BLF driver. The old Sonys have a 4 amp max discharge but voltage sag around 3.5-3.6 volt from, fresh charge. The newer(?) Samsung do a bit better but have not found spec sheet for the 26C battery. My IR average 112 to 118 so a high discharge battery should be way lower. My 25C liPo average 2-6 mOhm per cell.
Also might want to use the other thread to report battery testing.