Life span of an HP Calculator

[Matt Agajanian]

What I’ve noticed in relation to non-graphing student calculators is that some are sealed without an easily opened battery door and are low-budget-priced. So, I'm thinking that since particular models are so inexpensive, by time the calc has no more life in it, a replacement is cheap enough to justify buying a new one. A more beneficial scenario is that by time the battery is drained, a newer and greatly improved model is available. Thus making the need to purchase a replacement more appealing.