KamikazeParanoia

my maxx's both have mg995 12kg or so high torque .2 second servos in for steering and the tmaxx a high torque for brake, and currently have 6 volt 2000mah AA receiver packs, are these ok? or would i notice an increase in torque and speed running a hump pack which i assume has a higher discharge rate? i wouldnt know if the AA batteries are maxxed[sm=lol.gif] out or if they are harming the performance of the servos as i have no way of checking.. what do you guys think?


Thanks

skyraider71

It's always been my understanding that running a five cell 6v pack instead of 4.8v packs will
give you the most performance out of a given servo. I don't think the slightly higher voltage
AAs provide are worth the hassle and expense of having to change them after every couple
of running sessions. I would stick with 6v NiMh hump packs, or consider Lipos. BTW, I'm
thinking of switching to 6v packs in my planes, imagine 5 digital servos running on 4.8 volts!

KamikazeParanoia

its a rechargable 6v 2000mah nimh AA pack so no need to buy more

skyraider71

I missunderstood, I thought you were using disposable AA cells. Sounds like you are
already using a very good pack!

KamikazeParanoia

great glad i dont have to go buy 2 more lol
a 6v pack will really improve the performance of your servos, id highly recommend it

matts6887

It sounds to me as well that u are already using one heck of a pack!! So I would definitely stick with that

JB COMP

AA's don't give you any more volts then a NiMH or a NiCD will.

They all will out out 1.4V, unless you go with the lithium battery then they ahve 3.7V per cell.

Mah is only how long a battery will last.

Mah stands for milla amp hours. so your 2000mah will run something at 2000 milla amps (or 2 amps) for 1 hour.

rcdudegermy10

Energizer makes rechargable AA batteries that are really popular in digital cameras. These batteries are AA and are 1.5 volts each, using 4 in a conventional harness type set-up gives you 6 volts. Also these AAs are 2000mah to 2500mah each. I use them in my T-Maxx. I also have a 5 cell ofna 1400mah hump pack, but it has yet to be charged.

KamikazeParanoia

are they the energizer lithium? they sounded interesting
i have 2700mah nimh AA batteries for my transmitter and a sealed 6v pack for my receiver

i wonder if energizer will make rechargable lithium batteries as they should be lighter than nimh, however they would need special lithium chargers with balancers really, maybe we could adapt our chargers for them but most people wouldnt have those or pay for a special charger to save a little weight so who knows

JB COMP

A 6V NiHM pack does not put out 6V when its fully charged, it really puts out like 7V.

Just like the NiHM in my TX, The 8 should be 9.6V, but when charged they put out 11.2V (or something like that)

I have yet to see a AA dry cell put out 1.5V, all the ones I've seen are 1.4V or less.

KamikazeParanoia, lithium's don't need to be balanced, only metal cells do.

KamikazeParanoia

so you're saying if you had a pack of 4 aa lithium batteries, all 4 cells would discharge identically? unlike a 4 cell flight pack which doesnt? hows that work :s

JB COMP

I'm not sure how it works, but I've done some research on Lithium's and from what I remember you don't have to do a lot of things to them like you had to with NiHM or NiCD

Here's a link to info on Li-Ion batteries http://batteryuniversity.com/partone-5.htm

Here you can search for your self http://www.google.com/search?hl=en&q...=Google+Search

KamikazeParanoia

ahh wait a sec, are energizer lithium's lithium ion rather than polymer? do they not need balancing? [&:]

gmcman

I would opt for a 6V setup, if you can get this with 5 AA's then do it but I don't know how they would fit in the stock location. Pro's for the AA's are that you can get 2500 MAH and are reasonably priced. If you choose a 4 AA setup I would strongly urge you to secure them with either a velcro wire tie or the likes. That's the only caveat I have with them is if one were to pop out then you have a runaway truck that a failsafe won't save.

The 5 cell hump packs are great and make an easier 6V setup, just more expensive for the same amperage.

KamikazeParanoia

the 6v pack fits easy, just remove the top and bottom to the original battery box (2 screws) then 1 or 2 zipties around the new pack lay flat lengthways [&:]

i have a spider chassis on my tmaxx which made it even easier, one along the length and one across the width like a cross +
perfect

gmcman

Then I would go for the AA's. Get a few packs put together for a quick swap just make darn sure they are secured in the holder. As far as discharge rate is concerned....probably negligable at best...you are only running servos and they aren't going to pull enough current under normal use to be concerned about. Off topic.....just make sure your endpoint adjustment is set without the servos binding if you have this on your radio...really saves batts and servos.