Samsung SDI INR18650-29E7 18650 Lithium-ion Battery
I just changed 1 of these 3.7v in battery powered tire pump. 1 cell when bad, wasn’t very easy unsoldering and soldering new battery in. So if got 560 of these only way for individual to replace some would be get new cell pack. So, that bulk pack would have batteries cells connected, just replace the pack , I sure the pack can be reconditioned at company set up to do it if and when cell/cells go bad in pack and they will eventually go bad. Hopefully the cost in future will come done for lithium thus making packs more affordable.