Perhaps the game shop owner wasn't honest and replaced your new battery with something inferior?

If it's not a new battery, it might be from a used unit or it is just plain defective. The battery isn't meant to be taken out regularly so the seal doesn't matter.

Come to think of it, I had never measured the battery life of my NDSL before. I just keep playing it till the LED flashes red, then I'll hook it up to the charger and continue playing All I can say, mine can last more than five hours on the third brightness setting, max volume and with an R4.

It does consume a little more power than a game cart, but it shouldn't substantially affect battery life. Check the review here for a rough idea.

My solution to this problem will be to bring it back to the shop where you bought it, and enquire with them for a replacement. Or at least, get another battery from them to test if it's really the console or the battery.

Nevertheless, your battery life is still way out of the margin. What you should be getting is about 11 hours of battery life according to your settings, even with the 15% extra drain you still should be getting at least more than five.

Then it's time to pull for your consumer rights and get a new unit from them. You wouldn't be going back to them if you were happy with your purchase, right?

Standby mode, also known as sleep mode, eats very little battery charge. I accidentally left my DS on standby mode overnight after a few hours of gaming, and it was showed green on the LED the next day.

R4 flashcart inside. I accidentally left PocketPhysics on

I get the dreaded red LED after approxmiately more than 5 hours of playing with the setting on my previous posts.

Seriously, this place here is a community where everyone gets a chance to learn and all, but you're pissing the people here by not doing your homework. By doing your 'homework', I don't mean your BM essay but at least read up some knowledge on the subject that you want help with. Not knowing anything before firing off your salvo is akin to want us to spoonfeed you without you doing any effort yourself.

If you seriously don't know what's Google, chances you don't know what's the internet as well. I don't care how young or old you are, everyone is subject to the same rule. You're making a fool of yourself as though you just came out from an unknown civilisation.