I have the same issue with my psp3001.
I think the CMOS Battery is Depleted /Dead after many years of use from the date of manufacture up to present.
i’ve seen some videos with this psp problem, they Heat the Power IC with hot air ,remove the CMOS battery, charge it manually then solder it back to the PSP Motherboard and it worked. Or you can get these batteries from a dead psp motherboard .But I never tried this.
Or you can Try This … Works for me All the time
1>>Power your PSP with the original charger(or a powerbank in my case) and play continuously for 30-45mins without the battery.
2>>After playing for 30-45mins , Power off & Disconnect the charger or power bank
3>> Insert any working battery . AS FAST AS YOU CAN, you dont want to lose that residual charge on the motherboard .
In My Case i use a MODED Battery With An Original PCB Taken from the Original PSP Battery. Check the update portion below.
4>>Power On. Voila !!
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Still Works ! 100 %
My psp3001 works fine now. I use a moded battery. Don't throw your old original battery, the board(PCB) inside is still usable.
Try this...My PSP works like a gem. I just don't know if this is a 100% fix. But its been 2 1/2 months now.
TESTED: My battery last 5-6 hours of continuous playing(with headphone, mid level volume & lowest screen brightness setting).
Charging Time: 2hrs & 40mins=0% to Full Charged @ 5.10V and 0.8 Amperes.
Orange Light indicator Auto Shuts Off at full charge.
Charger: BOSE Soundlink II Speaker Charger 5V 1600mah + USB cable fit for the PSP charging port(4.0mmx1.7mm jack)
DISCLAIMER ALERT : DO THIS AT YOUR OWN RISK , I WILL NOT BE RESPONSIBLE FOR ANYTHING. THANK YOU .
1. I have a chinese battery from amazon (INSTEN) that won't work on my psp so i decided to salvage the battery cell but not the board.
Take extra care not to damage the parts inside while opening the original and the chinese battery.
You don't want to damage the board from the original battery and the cell from the chinese battery.
2. Now that you have the original board and a cell ,its time to assemble your moded battery. Connect the + and -. Google it if you don't know the polarities and how to connect it. In my case I didn't solder it or use a thin wire.
The chinese battery and the original board itself has a thin foil connection That connects them both to the + & - terminals so try to figure out how to reconstruct it. Putting some wires and some solder will have an added thickness effect on how will you fit the board & cell inside the casing.
I use the INSTEN Battery Casing.
The chinese INSTEN battery has way bigger cell compare to the original one, i also did not include the plastic internal panel that holds/ insulate the board from the original battery cell to reduce thickness.
On the new moded battery, i use a scotch tape instead to insulate the parts from sticking together inside and the same tape for resealing the battery casing. Just in case of trouble shooting, its easier to remove the tape if you want to open it again.Reducing the thickness is the key to get the perfect fit once you install it to the psp's battery bay/compartment with the battery back cover.
3. Before using the new moded battery, repeat the steps above (My Original Comment).
-Play for 30 to 45 minutes with the psp original battery charger without a battery
-after playing, install the moded battery as fast as you can and turn on the psp.
-Do this at least twice.
4. If the moded battery works,charge it until full charge. Play and discharge the battery until it turns off by itself. Do this twice just to re-calibrate the battery. It's just a way to reset the battery board to send the info to the psp to display the true battery life percentage.
-Full charge the battery, check the voltage with a multimeter, should show 4.20 to 4.22 volts (maybe more or less) at full charge.
A full charge PSP Battery is 4.2XX volts, It will not exceed that Maxpoint. PSP will Auto Shutdown the charging Process when the battery is full or has reached the Maxpoint. The Orange light indicator will shut off. Mine shuts off at 4.18Volts.
-If the battery fails to start the psp or the battery won’t charge.
-If the battery information say’s “EXTERNAL”.
SOLUTION :Repeat step 3 but go at least 1Hour of play w/o the battery.Repeat Repeat Repeat.
-Or Refer to my Original Comment Above.
This Article is from SONY's WEBSITE
The CHARGE light may flash for the following reasons:
The environmental temperature is too cold to charge the battery pack.
The battery pack has not been used for a long time.
There is a poor connection between the battery and charger.
There is a problem with the battery pack.
The CHARGE lamp may flash fast (multiple times a second) or slow (around 1.5 second intervals), depending on the cause.
Slow flashing occurs if the battery has not been charged for a long time or if the environmental temperature is not suitable for charging the battery. The slow flash should stop after a short while or after the temperature returns to a suitable range between 50°F and 86°F (10°C and 30°C).
Fast flashing indicates a poor connection between the battery and charger or a problem with the battery pack. Remove the battery from the charger and then use a dry cloth or cotton swap to clean the metal contact terminals on the battery. Afterwards, try charging the battery again. If the flashing continues, then the battery may need to be replaced.
I hope it helps, GOODLUCK !
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