Battery needs replaced in my Perry Ellis watch.

I replace the battery in my Michele watches myself. All you need is a very small screwdriver. 3 pack of replacement batteries on Amazon for $5.00. Takes Energizer or Renata 321 battery

This is a complicated repair, not just a battery exchange. Go to a watchmaker. Probably 40 bucks

A watch press will be needed.

RECOMENDATION:
Seek professional help.

To find a registered repair person in your area.
GOTO:
http://www.watch-clock-makers.org/
Hope this tip helps.
r/ David
http://antiqueclock.clockstop.com/

You need either a caseback knife or caseback wrench depending on whether it's a screwdown or snap-on back. If it's a snap-on, you'll also need a caseback presser to put it back on. Using the wrong tools can easily cause damage to your watch. If the watch is "water-resistant" be sure to replace the gasket as well or it will leak - you cannot reuse the gasket. You best bet to do this without having to buy tools, find the correct battery and gasket and risking scratching the watch is to let a watch shop or jeweler do it. Most places will charge about $8 to replace the battery and gasket. Sears sometimes charges only $4 so either way it's worth it. Even though I have the tools myself I usually bring my watches in and have it done since I'd have to go out and buy the battery & gasket anyway.

I removed the battery myself, and underneath are 2 metal prongs. One was bent down and not touching the battery. I pulled both of them up so they would touch the battery, and now it works fine.

I did it myself.Very easy use battery #394 buy at Walmart $5 made in Germany. I bought special tool to open and close the
watch on ebay

You can do it yourself. Unscrew watch caseback and undo the contact on top of battery. Read the writings on battery and buy exactly the same one. Do not mind manufacturers (Casio, Maxell, e.t.c.), just make sure the numbers are the same.
Some watch casebacks can be opened only if the watch band is removed, so, remove it if needed, just don't forget to memorize where every part and screw was fitted. Memorize how the battery is fitted and do not put the new one the other way around as this can damage your watch.
Actually there is nothing difficult - only you have to put everything back exactly the same way as it was. If your watch will be left without battery for more than 3 minutes, you will need to reset your watch after replacing a new battery, but it's easy if you've got users manual.
Good luck.

Do not forget to rate, please.

I found one of these on ebay. Here's the item I ordered.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=310129530689

I used the instructions here to replace the battery myself:

http://forums.watchuseek.com/showthread.php?p=226461#post226461

Hope this helps.