Average revenue (AR), is revenue per unit, and is found by dividing TR by the quantity sold, Q. AR is equivalent to the price of the product, where P x Q/Q = P, hence AR is also price. Marginal revenue (MR) is the revenue generated from selling one extra unit of a good or service.
Unused hearing aid batteries lose about 3% of their capacity every year. Batteries do fade; this is true across all battery brands. After year 4 the battery should have about 85-88% of its original capacity. Perforations will not occur. While the steel we use is thin, it has a lot of support underneath.
Rayovac World's Longest Lasting Mercury-Free Hearing Aid Batteries Size 312. 1  1.45V. 2  Do not swallow, dispose in fire, recharge or allow contact with metal objects or other batteries - may leak or rupture. 3  1.45V.  Do not swallow, dispose in fire, recharge or allow contact with metal objects or other batteries - may leak or rupture.