You need a charger that has a life / a123 setting as they have a nominal voltage of 3.3 and fully charged 3.6, cant be charged on normal lipo setting

No need to run any lvc with life packs, turn it off completely if you have that option

You will see power noticeably drop off when they hit 2.8v or so and they hold bugger all capacity between 2.8 and 2.0v

Newer Life packs come with reccomendations to not go below 2.5v for the first 10 cycles, then they can go down to 2.0v

Cheers