Pokemon Ruby/Sapphire ~ Help required!

[Shadamoo]

When I start the game up, it says:
"the Internal Battery has run dry. The game can still be played, but time-based events will not occur."

And so, I need it to have time! I saved up and bought some rare berries for growing, only to find it wont work because the berries will just die because they cant grow, since there is no time.

Note, I have the details for the Nintendo helping thing, here they are in case anyone else has problems. (I'm not saying this stuff will work, I'm saying it just in case it helps knowing whether they will still fix my game!)

Just send your Pokémon Ruby or Sapphire Game Pak to the following address, and we will upgrade your Game Pak:

Pokemon Ruby/Sapphire Berry Fix:
Nintendo Service Centre
Codestorm House
Walton Road
Farlington
Hampshire
PO6 1TR


Telephone: 0870 6060 247 (Calls are charged at the National Rate to the caller)

Our technicians will upgrade the game for you free of charge, and you'll also get a special surprise gift! To get your gift, your game must be set up properly. Here are the requirements:

1. Make sure that your active team has five or less Pokémon in it.
2. You must have saved the game at least once after obtaining Torchic, Treecko or Mudkip from Professor Birch.

If you meet these requirements, you'll receive a very special gift!

(Shiny Zigzagoon apparently)