Leica BP-SCL4 Lithium-Ion Battery Pack

hello everyone so as you can see i have quite a mess over here these are lithium-ion 18650 cells that are charging initially this guy come in with these batteries these are some leica batteries that are used for some gps units if you do power them they have like four cells in inside let me see if i can get that out yeah yeah so they have four cells they have these tiny bms i think it's rated for up to 15 amps i'm not really sure because it says here five amps i don't know if that's some kind of fuse or something and here it says 15 amps so probably it's related for 15 times i assume so yeah we have these bms's this one is good i have this all so this green one is also good these ones are broken so the idea here is that i'm gonna just shove a bms in there just like that it has three pins uh back minus pac-minus and back plus and dq i assume this because i've looked at some ic on a yes th