OK, listen up everyone. I have a lot of experience with NiMH batteries and dealing with Sunnbattery as well as Thomas Distributing. Here's my take:
1) Don't buy any other charger except the Maha 204F if you are only interested in charging AA and AAA batteries. This is the best charger out there, bar none.
2) If you are going to buy AA batteries, don't buy anything less than 1800 mAH. Go on eGay, search for 1800 mah and there should be a whole bunch. Stick to a good brand like Nexcell or Gold Peak. The Gold Peak 1800 mAH are going for $2.00 each
here. These are great batteries and for $2.00 each, you can't beat the price anywhere. Since it is a Dutch auction, you can get as many as you want for that price. I'd suggest getting about 20. Shipping is $5.50 regardless of how many batteries you order so you might as well get all that you think you'll need at once.
3) If you need a charger that can handle C, D, and 9V as well, then get something cheap like a Victor or Tyson charger. Those are not terribly fast chargers, but they are pretty safe and are of good build quality. I myself have a Tyson charger to charge my 9V. Btw, if you want 9V NiMH, don't buy from Sunnbattery or Thomas Distributing--their prices on 9V are pretty high for some reason. You can get decent 9V batteries from another guy on eGay, can't remember his ID but search for 9V nimh and you should find him. The picture of the 9V batteries should be pure WHITE. If you see some other brand, that's not the guy. The WHITE 9V NiMH batteries from this guy is about $2.00 or less each and is of good quality. I bought 16 of them and they work great.