Everything that is PSP-related but doesn't go in any other subforum
#420578 by Kartowl
Sun Oct 29, 2017 7:10 pm
So I looked up for a tutorial (this one https://pyra-handheld.com/boards/thread ... mod.77689/ ), but the guy uses a 3000mAh battery with 3.7v and I wonder if I could use a battery from a broken phone with a 4000mAh battery but with 4.4v.

I was also thinking if I could simply down the voltage with a trim pot to 3.6 or 3.7v or if I simpy just put it like this in there, because the input Voltage to charge the PSP is 5v and it is direcly wired to the power pins for the battery and you can use the PSP just with the charger and no battery in it, so would it break or burn the PSP if I use the 4.4v battery or should I down the Voltage to 3.6-3.7v?

Would the Trim Pot get too hot or is it alright to use a Trim Pot at such a low voltage difference?

BTW, thats the battery I have laying around
https://www.ebay.de/i/272845041423?chn=ps&dispItem=1
its smaller as the 3000mAh battery the guy uses in his tutorial
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#420839 by GreenGoblin12
Tue Nov 21, 2017 2:37 pm
Hey,

You have to use a 3.6V/3.7V battery, it does not matter about how much mAh there is on the battery, only issue you have is that you can not use anything higher than 3.7V or lower than 3.6V, otherwise you're looking at either melting/overheating/possibly burning your PSP.

I've done this mod using a simple 3.7V 3300 mAh battery (Lithium Polymer), I used the battery surge board from the original PSP battery then attached it to the new 3300 mAh battery I bought, it work's as it should no overheating etc, only downside is that you will get a inaccurate reading of how much battery life there actually is on the new battery (again a PSP hardware problem, no sensor).

Overall try to buy a lithium polymer battery which is 3.7V (they all sell this online or at you're local hardware/electronic depot) and think about how much mAh you actually need, the higher it is the fatter/longer/larger you're battery will be, the more complex it will be to attach into the PSP.

My battery size was 7cm by 7cm by 0.4mm (WxHxD(thickness)), I used the UMD compartment and cut a bit of plastic from the interior and from the UMD bay door to fit this in, it fit's fine, the door closes fine, no issue. Battery overall lasts about 12 hours and 19 minutes, I have timed this 4 times, on a running game, and believe me it's all you need it'll last very long, and charging takes just shy of 3 hours, using the original PSP AC outlet charger.

I would just not recommend the way that you have suggested to do it. Trim-pot (or trimmer potentiometer for those who don't know) is okay for use on various things PCB mounts etc, but when it comes to things like the PSP, then you might end up reducing the overall cycle lifespan of the battery, and possibly could end up short circuiting it thus increasing the Voltage back up to 4.4v. So for example when using it and it jumps back to 4.4v (the trim-pot failed) it messes up then it could cause a spark or short circuit the PSP rendering it useless.

It's understandable that many would like to use a battery lying around but if its higher in terms of Voltage, then the safer method would be to buy a cheap 3.7V 3000 mAh Li-Po battery and use the circuit board from an original battery or cheap knock off battery then solder with care and attach to the PSP.

The link to the battery you show, sorry but I hate those batteries, the new "Ribbon" type connector is not to my liking. I prefer the ones either with the solder taps for pos and neg protruding out, or with 2 12-14 single strand AWG wires attached (usually red/black), if you strip the top part of the battery (take the plastic connector off, then you will be breaking open the protective seal that house the actual battery inside, but as well you may end up causing a reaction (could end up smoking/fire) if not taking caution. If you decide to use a battery like that, then gently pry the top section off from the sides of where the plastic starts, this way you will end up revealing 2 internal connectors cut those, then take off the board/connector. Like I said do at your own will.

Otherwise good luck.
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