Richard has a Barnes and Noble Nook reader and he wants to know how many full recharges he gets. Leo says that he'll get about 500 full recharges as any given lithium ion battery will. But Richard hasn't ever run down his phone, keeping it plugged in most of the time. Now he can't recharge it. Leo says that a battery is always going down/up and it could just be worn out.
Mike got a Nook Android tablet and wants to know if he needs to worry about virus protection. Leo says not yet, and he doesn't know why tablets aren't getting more attention from hackers. Just in case, Leo suggests an app called Lookout.
No, those are pretty closed off. On Wi-Fi, she'll be out in the open, but won't need any kind of antivirus utility.