trentiusmaximus

I have a JR R700 receiver. I need a compatible battery and charger. What should I get and where?

DMcQuinn

My Feedback: (13)

The choice of battery is mostly a function of how large a plane and how many servos. Let us know these details.

GRANT ED

Yep, the choices are endless. Pretty much anything will work fine. What plane is it for?

trentiusmaximus

it is for a hangar 9 p-51 pts size 40. jr r700 receiver. total 5 servos. Im bidding on two 4.8v 700mah receiver type batts for like $5. Its cheap enough to just try and hope it works. What do you guys use? i would really like a higher quality battery. but i will use these for now.

Ed Smith

So you have an airplane, engine and radio system and you are bidding on cheap airborne batteries and hope they work. So what if they do not? Pay the money and get good batteries.

Ed S

d_bodary

My Feedback: (85)

A new 600mah 0r 700 mah pack 4.8volts probably won't be more than 17 bucks.

JimO

My Feedback: (7)

I agree get a good battery pack, you never know how those on Ebay have been treated. Most likely OK, but why take a chance. Have a look at www.onlybatterypacks.com I have been using their 850 NiMh flat packs and no problems 5 packs for 25.00 plus connector and shipping. Beats Ebay and you know they are fresh.


JimO

trentiusmaximus

They are new in box Jr 700 mah packs for $5. Im just saying i should try them anyway since i dont have any batts right now. I am asking for brand names etc. Thanks for the input.

trentiusmaximus

and what chargers do you guys use?

KW_Counter

I prefer something a little larger, in the 1500 range.
It gives me more flying time between charges.
I've never had to charge at the field, always had enough for the day.
It may throw your balance off some so be prepared to make some adjustments.
Don't buy a bunch of extra packs for the future - they have a tendency do die sitting around doing nothing.
I still use the wal-wart that came with my 600 mAh battery I just do it longer.
I've bought Ebay batteries and haven't been badly burned but not real excited about them either.
I do cycle several times to form and test them before they go in the plane.
I also have a fair amount of electronic experience to make these decisions with.
Others are right, why save $15 and risk your $150 plane?
Good Luck,
KW_Counter

JimO

My Feedback: (7)

Accu-cycle Elite does it all and you can take to field and charge from you field battery


JimO

trentiusmaximus

i would really not like to spend more on a battery charger than i did on the plane. im looking for something a bit more simple lol.

d_bodary

My Feedback: (85)

Did your airplane transmitter come with a charger? If the answer is yes it will probably charge the receiver pack also. As far as the mah that's a loaded question. for a standard servo equipped plane. such as your P-51 you should be able to get 5 or 6 flights between recharges. 10 minute flights.

JimO

My Feedback: (7)

So use the charger that came with your radio. Check your charge with a meter and you should be OK. Use an expanded scale meter that has a load switch for best results.

JimO

trentiusmaximus

i built the arf kit. my transmitter uses 8 AA batts.

trentiusmaximus

ok. i think i have made up my mind. I have already won the two ebay battery packs. (2x New, in box JR 4.8v 700mah packs for $6 shipped with charger). Now that that is over, I am also getting 1 or more higher quality batteries. Since RCU does not have a review section for batts, I am now asking what models you guys use. right now i am looking at a 6v 1000 mah 5cell pack (3amp output) from onlybatterypacks.com is this good? I also plan on getting one of their standard chargers with the correct adapter. I will take as much advice as possible (i really appreciate it actually). But I think is is good to have a couple of spares on hand dont you? (you cant beat $6 shipped for new batts lol). This is my first gas plane to own (i have flown many others before) and i just need a little help putting in the final pieces.

THanks guys.
Trent

TedMo

Trent: First RCU does have a batteries and chargers forum. Second you probably won the auction because most of us now prefer to use packs with higher Ma than 600. What you mention as some you are considering getting sound good but before you go to 6v. be sure your present Rx's servos can handle that voltage, most can but not all, generally speaking 6v. is prefered.

ErikElvis

My Feedback: (2)

I bought a few packs from all-battery.com I think. The 4.8 2300mah packs have served me well. I just bought some 6V 2300mah packs. Im going to see how they go. all battery is on ebay. I paid I think$14 for 2 4.8 2300mah packs.

BobPhx

Trent, do you have an expanded scale voltmeter or a loaded volt meter to check the condition of your batteries prior to each flight? Something like this?

http://www3.towerhobbies.com/cgi-bin...?&I=LXNK81&P=7

If not, you need to get one, and USE it. It can save you a crash.

Regards
Bob

Aerobat5

I always err on the side of a battery that is bigger than I need. I hate to be a spectator as my prize plane spirals into the ground because the battery died. I also use the battery to balance the airplane. Why add lead when you can use a larger battery that is going to work for you.