Welcome, this Offer is for a single Z Power Batterie for rechargeable hearing aids (need to be Z Power charger kit to work) Riot Energy (formerly ZPower) is the only manufacturer of the patented ZPower 312 silver-zinc rechargeable battery. Made in the USA and shipped direct to you. Works for: Z Power Widex Z Power Oticon Z Power Bernafon Z Power Resound Z Power Interton Z Power NewEar Z Power Starkey If you have any questions please contact us. You receive: !1 zPower 312 rechargeable batterie!