Battery purchases in pairs come with case

Nominal Capacity: 3000 mAh
Nominal Voltage: 3.6V
Discharge End Voltage: 2.5V
Max. Continuous Discharging Current:  15A
Dimensions:
66.63mm (L) x 18.59 mm (D)

Read HKJ's review of the cell https://lygte-info.dk/review/batteries2012/Samsung%20INR18650-30Q%203000mAh%20%28Pink%29%20UK.html

Warnings:
-Do not overdischarge/overcharge
-Recharge drained batteries ASAP
-Do not short circuit
-Do not dispose of in fire
-Do not expose to extreme heat or water
-Please be familiar with handling lithium-ion batteries before purchase.