Extra Power size 312 hearing aid batteries, colour coded brown. Discounts available when purchasing multiple packs as below, free shipping is standard. Used mainly for half shell / canal (ITC) and RIC / RITE hearing aids. These batteries are a ‘white label’ product, manufactured by Rayovac. They are manufactured to the same high standards, effectively the same battery in a different pack and with a lower price! Typically over 3 years of shelf life. 1.45v. Please select the quantity you require from the drop down box. 1 pack (6) = £1.75 5 packs (30) = £6.95 (Discount 20%) 10 packs (60) = £12.95 (Discount 26%) Please note – we only ship to UK postal addresses.