Home Parts/Accessories Batteries 2-5 V Li-ion 2.5 V Li-ionHEINE M2Z 4 NT rechargeable battery 2.5 V Li-ion For F.O. 4 Slim LED NT Laryngoscope Handle HEINE S2Z 4 NT charging module 2.5 V Li-ion For F.O. 4 SHORT LED NT Laryngoscope Handle