Duracell Hearing Aid Battery 675 Blue 6 Pack have been designed so they are lightweight and easy to fit with their tabs. The 675 Blue batteries have long-lasting power and once used up they are easily disposable.
The nearest shop to my house is a pharmacy so I never considered an online service until I changed my hearing aids and couldn't find a local source of batteries for them.
I found the service very efficient and easy to use.