Here’s another great article from Atiwa, my current favorite company for laptop repair, all about the importance of battery backup systems and how to choose the correct one. Battery backups are used to be sure if you lose power in power in the middle of a tedious job, you won’t lose your data because the power goes out. He mentions APC which is what I use. And I test it periodically by unplugging it to see how long I really have when the power goes down. Of course, there’s a yellow light that comes on to tell me if the battery is dying, but what if that LED goes bad? In my business, I can’t afford to lose data that I’ve spent an hour working on. Can you?