Quote:
Originally Posted by PF4Mobile
there must be an electrical way to fool the voltage or the current sensor so you can work with the device plugged in without a batery
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Depends how it's wired up. Some devices (eg most laptops) have external power going directly to the motherboard, which then also charges the battery. They'll work fine with no battery. Other devices, however, have external power going to the battery, and then the battery powering the motherboard. They won't work with a dead battery.