Rayovac ProLine mercury free hearing aid batteries.

These batteries are colour coded as well as number coded.

Size 10 - yellow - dimensions 5.8mm diameter x 3.6mm depth

Size 312 - brown - dimensions 7.8mm diameter x 3.6mm depth

Size 13 - orange - dimensions 7.8mm diameter x 5.4mm depth

These batteries ship with a higher quantity of 8 cells per pack and a handy longer tab, as well as more robust packaging for those with dexterity issues.

Rayovac hearing aid batteries can also be supplied in other variations;

Rayovac Extra - the most commonly supplied variant of Rayovac hearing aid batteries, supplied in a 6 pack and the most widely supplied hearing aid battery in the UK.

Extra Power - a white label version of the same Rayovac battery, but as it is white label (ie without the name Rayovac on the pack) it can be supplied at a bit of a discount.  Check them out here

Rayovac Crystal Clear - same Rayovac battery but supplied ONLY for the NHS supply chain. If you see Crystal Clear batteries for sale on eBay it is NHS property being sold. You might want to ask the seller why. Often the top of the pack is cut off which typically states 'Made for NHS', 'Not for Resale' or similar.

We supply Rayovac Extra, Rayovac Proline and Extra Power but DO NOT supply Rayovac Crystal Clear as they are NHS property.

These batteries typically have over 3 years of shelf life on them.