Nitecore Sysmax Digicharger D4 EU - intelligent charger for Li-Ion, LiFePo4, Ni-MH, Ni-CD batteries | akkuteile.de
General Electric - 18660 Battery | Complete Battery Source
Manufacturer Rechargeable 18650 2s2p 7.4V 4000mAh Lithium Battery Pack Li-ion Battery Charged for LED Light/Working Lamp - China 12V Lithium Battery, Li-ion Battery | Made-in-China.com
Optimal voltage for Li-ion batteries' storage : r/18650masterrace
TB-18650IC26-BP1 18650 size 2.6Ah Protected Lithium Ion Torch Battery (sometimes called 18700)
Amazon.com: 18650 Rechargeable Battery, 3.7 V Lithium Battery, Li-Ion Battery, 1800mAh High Capacity 18650 Battery Torch/Drone/Headlamp/Batteries With Long Life For RC Cars,4 Pcs,Button Top : Health & Household