so the fuse in my psp died awhile back and i looked at the battery its 3.6v 1200mAh Li-ion battery pack, so was wondering if anyone knows if they are protected, would make for a good slim style battery for my next mod
PSP Slim style battery
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Yes they are protected (among other things -- one of the early ways to jailbreak a PSP was to de-solder one leg of the IC inside the battery case, which put the PSP into a debug mode that allowed you to load unsigned firmware on it)
Use a PSP to charge it (broken ones that can still charge the battery are dirt cheap), and build an enclosure for it to vape off of... PSP batteries are actually better suited than most mobile device batteries for something like this as a) they are everywhere, and since they are from a reputable manufacturer (well, more reputable than most of the one you'd get from DX or Ali Express) you know for sure what you are getting, b) they are obsolete now (so very inexpensive), and c) they use a spring-loaded 'blade' type connector instead of contact points, so your PV's IC doesn't have to be anywhere near as exact.
But are the batteries parallel enough that they don't mind putting out lots of current? The psp at full tilt probably doesn't draw as much current as a 2ohm atty is going to pull.
These are likely about the same as cell phone batts, which are made for low drain and longevity. Also like the phone, the protection is in the PSP, not the battery. The tabs are just leads to take a reading.
PSP Battery Pack Teardown -- They do have the protection circuit built in, on the same board as the security chip (and the tabs to take readings).
Also, on an 1800mAh battery a 2 ohm atty is only 1C.
Also, on an 1800mAh battery a 2 ohm atty is only 1C.
Well respect, they are protected. I wonder what the decision process was for that, either the battery came last in the design and had extra space, or if it made room for something else. There's a 2200 mah battery too.
Hey cool, I only had to muddle through Hen PRO and Prometheus loader trickery. Is the Pandora made from a Sony battery too? It seems this strategy along with the security chip is to keep 3rd party batteries out of the question. Not to mention the 'unique' shape LOL.
It MOSTLY only worked with "official" batteries -- most of the third party ones didn't have the service mode EEPROM on their PCBs; it didn't keep you from using them and I've always been fairly confused why they left this mode in at all. Basically, you either flashed that chip (if you had another PSP that had CFW on it already) or removed the ground pin so it couldn't make a connection (if you were bootstrapping your first one) -- so when the microcontroller tries to read it, it just gets back a string of 1s instead of the actual serial number of the battery. If you booted a PSP off of one of these batteries (or even inserted it into a turned off PSP), it would start copying firmware files from the memory stick, and *bang* instant CFW PSP.
EDIT: This is a really old technique -- as far as I know it was patched in firmware 3.5, and only worked on original/first generation slim machines.
EDIT: This is a really old technique -- as far as I know it was patched in firmware 3.5, and only worked on original/first generation slim machines.
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