Need some charger advice...and battery selection

[KryptoRoxx]

Ok first I am really new to the hobby and with all of the different types of batteries around my head tends to spin a little. I run nitro but I also run a bump box off of 2 8.4v 4500 Nimh batteries. I am already sick and tired of AA batteries and I know this will get expensive since they only get used 1 time. I looked at rechargeable AAs and I then looked around at the 6V nimh or the 6.6 lipo hump packs for running my servos. Do I need to have a balancer or anything to run the 6.6 lipo on my nitro?? Sorry if that seems stupid but my choices so far on batteries has sucked so far. I got a cheaper charger (my fault really) that has disappointed me greatly. I am also going to a MX3 from Airtronics for my radio. It says that it can take a two cell lipo or a 6 cell nimh. With all of these batteries I would need a good charger. I know that I need to discharge the batteries before charging them but the only thing that I have to discharge with is my bump box....So can you guys point me in the right direction to what kind of charger I need? At this point I will pay a good amount of money to get a quality charger. Here's what I've found so you're not doing all of the legwork. I think I have it figured out but verification is nice since I live in Japan and I can't exactly go to the nearest hobby shop and ask (I speak enough Japanese to order sushi..)

Here are the battery packs I own/am going to buy shortly.
http://www.amainhobbies.com/product...Cell-Voltage-Increased-Stick-Pack-84V-4500mAh
http://www.amainhobbies.com/product...-Orion-Marathon-XL-1900mAh-Hump-Receiver-Pack (hope this fits in a Kyosho Inferno.....if you know I would appreciate the opinion)
http://www.amainhobbies.com/product...ies-1-1200mAh-1-16-Scale-Battery-72-Volt-NiMH (I bought these as a mistake for my bump box but I think they will work with the MX3)

Now here are the chargers where I need the advice. I currently own a Twin Peak charger and I need one that will discharge as well.
http://www.amainhobbies.com/product...Life-NiMH-NiCD-DC-Battery-Charger-6S-10A-250W
http://www.amainhobbies.com/product...6/products_id/140733/n/Venom-Pro-Charger-Plus
http://www.amainhobbies.com/product...ife-NiMH-NiCD-DC-Battery-Charger-10S-10A-300W

If there is another charger I am missing please point me in the right direction. I would like to be able to charge more than one battery at a time.....if there's one that will charge all those batteries at once I would love that since usually I go out and run for about 2-3 hours and then return and charge the batteries (am I supposed to store the batteries empty or full?) and then in a couple of days I will go out and run again. Sorry for the longwinded post but I tried to explain myself in laymen's terms because I have almost no idea what the HE__ I'm doing yet.

 

[darkslayor24]

for a betery charger go with the turnigy accucell 6. you have to order it from hobbyking.com from china. no us companys sell it. i won one and its the best little charger I've found yet. it charges everything. has a built in lipo balancer. and is dirt cheap. i love it.

batteries:
reciever pack
5000mah lipo
3200mah lipo
4200 nimh
the higher the mah, the longer the batery will last. lipo batterys keep a constant output throughout the drainage of the battery and then drop off sudenly. nimh batterys slowly loose output as the battery is drained. reciever packs are made specialy for recievers. stick packs can be used for almost anything.i would use rechargeable AA batteries for your radio.

i would also switch your battery connectors to deans you will need to solder these on. i bought a walmart soldering iron (irons are better than guns) and it does its purpose.

 

[KryptoRoxx]

Thanks for the knowledge.....sadly I can't use lipo in my bump box. I would have loved the constant same speed until it died. Se la vie. Well I have a couple of 1500mah battery packs that could be used for the radio since they don't power the bump box for very long so I was planning on using those to power it. I would imagine that I could sneak the battery pack up the grip since there isn't much that goes in there. Are there any chargers that do multiple batteries at once? I'm heading up to Tokyo here in a couple of weeks and I'll have plenty of cash to burn while I'm there and to top it off there are some huge hobby shops up there. Apparently there's a lot of r/c action up there but I won't be able to take my car .