C2Tech Recharge Grip
If you often get cramps playing with your DS then this is for you. Not only does it give you a comfortable grip, it also has a 2600mah battery built-in to charge your DSL battery. I got this one for $15 at Superstore. It definitely helps when playing games for long periods of time.
You charge the grip by using the original DS adapter. Then when you run out of juice on the DS, you plug in the cable from the grip to the DS and turn it on. When the DS is in the grip, you can still access the DS cartridge slot. However, your stylus is inaccessible.
