Home Parts/Accessories Batteries 3-5 V NiMH 3.5 V NiMHHEINE K3Z rechargeable battery 3.5 V NiMH For Short F.O. Laryngoscope Handle HEINE M3Z rechargeable battery 3.5 V NiMH For BETA Slim rechargeable handle and Small F.O. Laryngoscope handle