Humpack or AA's

[odiwan]

Got a question that needs answering about batteries for my cars electronics. My car takes 4 AA's or a humpack, right now i am just burning off the batteries i got for xmas but for future use i would like to use rechargables for my car. Anyone have experience with rechargable AA's or humpacks, pro's and cons of both would be great? Thanks!

 

[SchrodeMode]

Get a humpack, they put out 6v. If you start using rechargeable AAs, your servos are going to be slower and weaker because they'll only be getting 4.8v. Normal AAs are 1.5v, rechargeable are 1.2v, a humpack will have 5 cells.
1.5 *4= 6 (current setup)
1.2 *4= 4.8 (rechargeable AAs)
1.2 *4= 6 (humpack)


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[tmaxxfreek]

Humpacks end up costing less too, i always bought 2 for each of my nitro's incase one went dead in the field i had a spare

 

[WinnersCircle]

Got a question that needs answering about batteries for my cars electronics. My car takes 4 AA's or a humpack, right now i am just burning off the batteries i got for xmas but for future use i would like to use rechargables for my car. Anyone have experience with rechargable AA's or humpacks, pro's and cons of both would be great? Thanks!

The ultimate hump pack is a lipo pack. They put 7.4v and you will get even better servo performance. They also are higher capacity so you should hot have an issue with the batteries going dead during the day.

The con for them is that you need a lipo charger and a low voltage cut off to prevent the battery from over discharging. Over discharging ruins them. Some people run a voltage regulator to reduce the voltage to the servos but I never have done this and I haven't had any servo issues as a result of running a lipo.

It is amazing how much faster your servos are when using a lipo.

Lee

 

[wacmartin]

To run a 2s lipo (7.4v) you're going to need a voltage regulator for servos rated at 6.0v or just hv servos which can use a nimh hump pack at 6.0v or to optimize them to their full potential a 2s lipo 7.4v. Also to run a 2s lipo 7.4v you need to make sure your receiver can handle it as well. Servos and receivers can be expensive and I wouldn't go running them on a lipo without a voltage regulator unless you know they can handle the voltage.

 

[Greywolf74]

Personally I prefer to use 2S LiFe batteries. Same benefits but instead of sending 8.4V to your servos you're only sending 6.8V. Unless you have high voltage servos then use a 2S LiPo.