what reciever battery do need?
 

i need to find out what type of reciever battery i need. Im going to make a custom pack from cheapbatterypacks.com, but i need to know what voltage (number of cells) i need and what connector. Im thinking of a 9.6v flat pack with a hitec male connector. If im wrong about the voltage or connector please correct me! and please tell how i charge the battery!

RE: what reciever battery do need?
 

For a receiver pack you want 4.8 volts (4 cell) or 6.0 volts (5 cell). 9.6 volts is way too much. The Hitec male connector should work.

Bruce

RE: what reciever battery do need?
 

For what you can purchase decent pre-made packs from some sources, why bother?

RE: what reciever battery do need?
 

There are a lot of pitfalls making your own battery packs, and as Opjose said, they are so reasonably priced, why bother.

One of the major factors is heat necessary in making the series connections for the packs. And, you do NOT want to use those little plastic holders with springs in them.

The internal seals in battery packs can be easily broken by heat if the heat is not properly applied when "soldering" the packs together, and if to much heat is used in the process.

And, because they are a series connection, one open in the path between the battery packs and you have basically a dead pack. No matter what anyone says, "I've done it and there is no problem", trust that you just can't afford to have a receiver pack go bad on you in flight, where the vibration can and will cause a poor connection to open on you causing a crash. Consider where that plane may crash if and when it does.

CGr.

RE: what reciever battery do need?
 

Just throwing this out there, but cheapbatterypacks.com has a thing where you can "build" custom packs. You choose the details and they build the pack for you to your specs. This might be what he is talking about.

RE: what reciever battery do need?
 

9.6 volts is way too much......you didn't mention capacity......how many servos, analog, or digital.......the capacity of a battery you're going to use depends on the load you're going to put on it.....if your going to use 8 or 9 high torque digital servos then you want 6 volt 3200mAh battery...actually a li-ion battery and a regualtor would be best.
But if your using 5 analog standard servo then a 4.8 volt Nicad 600mAh battery, would do.
Remember batteries in series and voltage is additive, current remain the same....batteries in parallel voltage remains the same but current is additive....or in other words more capacity and longer charge times.......

RE: what reciever battery do need?
 

For 4.8v applications on .60 and up planes I've been using these 3000mAh packs...


[link=http://www.bphobbies.com/view.asp?id=A1130077&pid=NKA06124]Click me![/link]

Also for ignition batteries for gassers....

Yeah $8.71 for the pack!

They are so cheap, that I purchased one to break it apart and use the cells separately for glow plug ignitors.


Now if I could only find 3000-4000mAh 6v packs as cheap!

RE: what reciever battery do need?
 

Pay attention to your servos as well.
There are some servos that can't handle 6v so you will need 4.8v if you are using them.

RE: what reciever battery do need?
 

thats what i was talking about! sorry for the confusion. I meant to order a custom pack and have them build it. I just have two more questions. One- what do i charge the reciever pack with? And two- i have a spektrum ar500 reciever. Im pretty sure the male hitec will just fit right into the batt/bind port correct?

RE: what reciever battery do need?
 

im just using 4 analog servos

RE: what reciever battery do need?
 

If your running 4 regular sized servos (40-50oz) in a sport plane, you will need a 4 cell 4.8 volt 600 - 700 mil amp Nicad battery. you will need a 50 to 60 mil amp wall charger. This is a standard pack that comes with most radios and is available at any hobby shop for under $20. Spectrum uses JR connectors which are compatable with Hitec and Airtronics as well. Dont forget an on/off switch with charge lead as well. there is so much bad information out there about batteries, so be careful.

RE: what reciever battery do need?
 

You should be aware that the Spektrums like higher voltages.

RE: what reciever battery do need?
 

If I were you, I would go with a 6 volt system with about 1400-1600 capacity cells. This is because you will be able to take this battery into your next plane, which may have 5 or 6 servos and it will still last a long time. The weight gain really isn't that much and your servos will be faster and hold stronger with the 6 volts.

RE: what reciever battery do need?
 

I've read lots of threads on RCU saying you should run a 6 volt pack with Spektrum receivers.

One option for a 6 volt pack, $20 with your choice of connector. Sanyo 1700 mah cells.
http://www.cermark.com/products/Sany...00MAH-AUL.html

Here is a link to a switch harness with charge jack that should work fine.
http://www.cermark.com/products/JR%2...ging-jack.html

You can get a wall wart charger, for 9 bucks, that has 125 mah output to charge a decent sized pack overnight.
http://www.cermark.com/products/CHAR...-125-MAH.html#
You can buy "smart" chargers, cyclers, etc, (a lot more than 9 bucks) but this one will work for basic needs

RE: what reciever battery do need?
 

could i use this as a reciever battery? or will it fry my spektrum reciever and servos?

http://h1070026.hobbyshopnow.com/pro...p?prod=VNR1560

RE: what reciever battery do need?
 

You could use that pack if you also install a Voltage regulator/BEC to bring the voltage down to 6.0 volts.

RE: what reciever battery do need?
 

You could also use it if you have the new series of high voltage servos that are becoming available. Your receiver will work just fine on it, but it will fry standard servos.

RE: what reciever battery do need?
 

I have a bunch of RX packs from CheapBatteryPacks.com, and like them a lot. They have a great selection of cells of various capacities and as mentioned, they will weld together a pack in a custom shape if you want. Prices are quite reasonable.

On my Spektrum brand RX's, I've been moving planes over to 6v Nimh packs of 2600 or 2700mah capacity, which are standard AA cells and work great. I do have some Spektrum RXs on 4-cell packs and they work fine as well, I'm just going with the extra cell for insurance on some of my nicer planes.

For a charger, you CAN use your wall wart that came with the radio system. It WILL charge a 5-cell pack, it just takes longer, and it should eventually charge a high capacity pack, but it will take days to do so.

I don't recommend you use the wall wart. And if you do, be sure to use a voltmeter to check the pack. I've seen more than one guy use the same "charge for 10-12hrs with wall wart" routine on a 2000+ pack and then crash because the charger wasn't getting the battery fully charged.

You will be much much better off getting some other charger. I use the Ace Digipulse 6-output charger here:
http://www.acehobby.com/ace/ACE2521.htm
Because I don't have to think about how many cells in which airplane, and it will do even large packs with enough time. It says it only does packs up to 2000mah, but it does fully charge my 2600 and 2700 packs just fine. And having 6 outputs means I can keep several planes and TX's charged at once.

There are lots of other options for chargers though. If you get one of the peak detection fast chargers, those are nice to have, but be aware that you really want to do a long slow charge the first time or two on a high capacity Nimh pack or you won't get even close to the rated charge out of it. And new Nimh packs often "false peak", fooling the charger into thinking the back is fully charged when it isn't. So use your voltmeter.

Btw, I also picked up an 8-cell 2700 for my JR 9303 TX, now I can fly all day easily, or get a couple of flights in over 2-4 days with out charging.