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Battery Pack Options

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ubergeek

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I know most people are using 6V hump pack but I was wondering if anyone is using 4.8v AA instead. I've got a set of 2200mh AAs I can use.this will definitely last longer than 1200mah pack.
Is there a noticeable perf diff betwee two?
 
Yes there will be a noticable difference, especially in steering, heck, I noticed a difference from when I switched from brand new AA's to my 5-cell hump pack. You really won't want to go w/ rechargable AA's unless it's all you got...
 
You can use them and they will last you a long time, but you will only be putting out 4.8 volts, most servos work best a 6.0 volts, your servos will not have nearly enough torque and they will be slower.
 
Thanks for responses.
Acutally, the actual output from 4 NIMH cells are 5.86V according to my digital volt meter and even ultra high torque servo works fine w/4.8 V according to the spec.( about 20% slower)

SPECS: Speed: 0.24 sec/60 degrees at 4.8V
0.20 sec/60 degrees at 6.0V
Torque: 106.93 oz/in at 4.8V (7.7kg/cm)
133.31 oz/in at 6.0V (9.6kg/cm



This is a Hitec, Ultra Torque, Metal Gear Servo with a
Hitec, JR, or Airtronics-Z Style Connector.

FEATURES: Three metal gears.
Dual ball bearings.
Metal 1st Gear.
Four adjustable splined horns.
For use with .60 size helicopters, gas or electric cars and boats.

INCLUDES: One ultra torque servo with 11.5" connector wire.
One white small X-shaped servo horn.
One red Large X-shaped servo horn.
One white adjustable servo horn.
One white off-set straight servo horn.
Four 2 x 14mm mounting screws
Four brass eyelets
Four black rubber vibration isolators.

REQUIRES: Hitec, JR, and Airtronics-Z radio system

SPECS: Speed: 0.24 sec/60 degrees at 4.8V
0.20 sec/60 degrees at 6.0V
Torque: 106.93 oz/in at 4.8V (7.7kg/cm)
133.31 oz/in at 6.0V (9.6kg/cm)
Length: 1.59" (40.6mm)
Width: 0.77" (19.8mm)
Height: 1.48" (37.8mm)
Weight: 2.11oz (60g)
 
What you need to account for is the drop in voltage as the pack is being used. It may start off high but during the first several minutes of operation the voltage will drop off to a certain point, level off for a while then continue to drop. With the extra cell you will enjoy better power.

a 1200 should afford you many tanks of fun before needing to be recharged. I havent had any good 5 cell pack not last a good day at the track or out bashing. IMO the extra cell is well worth the trade off of shorter runtime.
 
How long do the 5-cells last whne there not in use. I just bought a brand new one and fully charged it last night. Will I get peak performance or should i through it back on the charger before i go out? Thanks guys.
 
Well, pretty much all rechargable batteries of all kinds will loose power even from not beein in use. But you don't really need to throw it on the charger, unless you have a race coming up in a few mins...
 
The newer hump packs should last several weeks or even months without use. Its not a good idea just to go run without charging it up the day your going out or the evening before.
 
Will a regular 5 cell hump pack fit in the Savage? One that has 3 batts on the bottom and then 2 on top of those? Like the Venom hump pack?

Thanks
 
Yes it will, I'm using the venom hump pack in mine now anyway. But any 5-cell hump pack will fit in the stock location.
 
Fantastic, thanks!

Should be getting my Savage delivered on Friday, along with an Ofna buggy.
 
dont 4 AA's have 6 volts as well? i was reading the ladeling on the outside and it said 1.5 volts.

so 4 AA's with 1.5 volts should be 6 volts total
 
Yes, but w/ AA's you're getting those full 6 volts for only a few mins, whereas w/ the 5-cell hump pack you're getting the full 6 volts for a few runs, and plus it's rechargable so you don't have to buy AA's...
 
cvec7 said:
Yes, but w/ AA's you're getting those full 6 volts for only a few mins, whereas w/ the 5-cell hump pack you're getting the full 6 volts for a few runs, and plus it's rechargable so you don't have to buy AA's...
Click to expand...

i see...
 
no I think you do get 6 volts from 4 REGULAR AA batteries, you run into a problem when you use rechargeables b/c they put off less voltage (there are different chemicals, thus a different amount of power) rechargeable batteries run at 1.2 v where alkaline batteries run at 1.5 v correct me if anything I said is wrong
 
Yes, you do get 6 volts from REGULAR AA's, BUT only for a few mins like I said because they drain gradually whereas on ni-mh it's a lot more durastic, so you get the full 6 volts for a few runs.
 

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