Function
Supply electricityr to hearing aid
Advantage
Durable; Enviroment-friendly
Sizes, Capacity
675A-570mAh; 13A-260mAh; 312A-140mAh; 10A-70mAh.
Service life
Around two weeks (depend on consumption by hearing aid)
Discount
Available, in large quantities
Shipping
Courier service by DHL, TNT, FedEx etc.