Laptop batteries have a microcontroller. That chip allows lithium-ion laptop batteries to regulate their own heat (and hopefully keep from exploding or catching fire, right?) and to know when to stop charging, even if the laptop itself isn't on. The chip also allows the OS and charger to monitor the battery.
That includes "permanently ruining batteries Apple M7385 Battery at will, and may enable nastier tricks like implanting them with hidden malware that infects the computer no matter how many times software is reinstalled or even potentially causing the batteries to heat up, catch fire or explode," Forbes said.
Laptop batteries of today's devices now have a chip which monitors the power level of the unit. This allows the operating system and charger to keep a check of the Apple M7385G Battery and respond accordingly, and allows lithium lion batteries to know when to stop charging if the unit is powered off.
Passwords were discovered by Miller which are used to alter Apple laptop batteries, by studying a 2009 software update Apple had used to fix a problem with MacBook batteries. Once accessed he was able to change the chips firmware and make it give out whatever readings he wanted.
Miller managed to permanently brick seven batteries at a cost of $130 a piece during his tests. But if criminals managed to install malicious malware that infects the rest of the laptop, they could control its functions, cause it to crash, or steal data. The Apple M7318 Battery's firmware would be the last place most IT administrators would look for an infection, and if not found it could re-infect the computer again and again.
When we think about data security and possible vulnerabilities in our computing systems, the laptop battery Apple M6392 Battery generally doesn't come to mind as a hacker target. Well, security researcher Charlie Miller discovered that modern laptop batteries are just as hackable as anything else and may be far more difficult to detect, after he examined the batteries in several MacBooks, MacBook Pros, and MacBook Airs.
The trouble is the batteries chips come with default passwords, so if anyone manages to discover the passwords they may be able to control the chips firmware. The hacker could then potentially ruin the batteries or implant them with hidden malware which could infect the laptop. Miller said “These batteriesApple M6091 Batteryjust aren't designed with the idea that people will mess with them”. But the trouble is it is possible.