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 [PSP HardMod] Build your own Portable Battery Charger

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PostSubject: [PSP HardMod] Build your own Portable Battery Charger   Mon Sep 08, 2008 2:00 am

A Free-Be Fun Tutorial
Auri Rahimzadeh

Tutorial Source





Hereís a quick, cheap solution for building your own portable battery pack. Youíre going to
spend about $25 on this solution, but itís easy to build a number of
battery packs and the batteries are interchangeable and charge quickly.
Unlike when you use the Pelican Power Brick,
you can put the 15-minute rechargeable battery solutions available from Energizer, Rayovac,
and many others, in this battery pack and have it ready to go in under 20 minutes (after itís
built, of course).
Hereís what you need:






  • Four-battery AA battery holder with a snap connector, available at Radio Shack (about
    $3, model number 270-383)
  • Four NiMH 1800 mAh or greater AA rechargeable batteries
  • The charger for the lithium ion batteries (about $10Ė$20)
  • 9V battery snap connector (Radio shack model number 270-325; about $1.99.
  • A Radio Shack DC power plug to connect the battery pack to your PSP (Radio Shack
    model number 274-1532; about $2.59: usually found in their ďBĒ bin.
  • A soldering iron and solder so you can connect the DC power plug to the battery snap
    connector







Step 1: Charge the Batteries and
Place Them in the Battery Holder

Charge the batteries with their associated charger and place them in the battery pack. This is
where you will be glad you purchased the quick-charge batteries, because they can be charged
right before you go to school, to work, or on a trip (no more overnight charging).







Do not charge quick-charge batteries at the same time with other nonĖquick-charge batteries or
other quick-charge batteries of a different brand. Most chargers warn you about this, but Iím
reiterating the fact. Some batteries were not made for quick-charge chargers, and the results can
be anything from all batteries charging slowly, to battery leakage or battery explosions. Be careful
and read the instructions that came with your charger!






Step 2: Solder the Snap Connector to the DC Plug
Unscrew the power plug casing and you will see two connectionsóone on the outside and one
on the inside. On the PSP, positive (+) is the center pin while the outside is ground (-), so you
need the red wire from the snap connector soldered to the inside contact, and the black wire to
the outside connector. Before you start soldering, make sure you run the wires through the DC
plugís casing




!!Make
sure the wires and their respective solder donít touch each other or
you will short your batteries and possibly damage your PSP
!!
.






The snap connector wires run through the DC power plugís casing

Apply the soldering iron to the surface you are soldering, not the solder, otherwise you may get
a cold solder joint, which may not let enough current through and your battery pack may not
work.If you donít know how to solder, get a friend who does to help you. I used a Cold Heat soldering
iron because itís clean, easy to use, and wireless although itís harder
touse on small components like the DC power plug. If you are buying
your first soldering iron,
you may prefer a classic soldering iron because itís more straightforward.






Step 3: Play
Well, thatís it! Plug the power cable from your battery holder into your PSP and youíre good to
go. Your new battery pack charges your PSPís lithium-ion battery
while you play. Your PSP should automatically stop drawing power from the battery pack once
it is charged. However, I suggest unplugging the external battery pack when itís not in use, or
when the light on your PSP goes from orange (charging) to green (charged). You should also
consider buying a battery pack cover from Radio Shack for additional protection.


I followed this tutorial myself and its pretty useful if you
can't find a Outlet or Car Outlet. Charge on the Go, useful yet simple.
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