Samsung lithium ion single cell INR18650-25R in cheap 2-Pack with AccuPower storage
Safety note: Please note that lithium cells may be used only by authorized experts. Improperly handling or short circuit may result in fire or explosion.
Further safety instructions for Lithium-ion batteries: http://accupower.at/media/Safety notee_fuer_Lithium_Ionen_batteries.pdf
Lithium-ion batteries have no memory effect. They operate on the basis of lithium and are characterized by a high energy density.