This may seem like a stupid question. But in looking at the istick a thought occurs to me. Since rechargeable batteries have a shelf life, meaning that they only charge so many cycles, and knowing that the istick has a battery that is not remove able.... Doesn't that mean that eventually the thing will become useless? I'm looking at one for my wife and don't want to buy it if it's just going to become a paperweight down the road. Seems to me they shouldn't have made it unremoveable. Or am I misinformed?