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Battery upgrade for Spektrum

Old 05-18-2008, 11:08 PM
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cdw21
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Default Battery upgrade for Spektrum

Hey everyone,

I have a Spektrum DX7 and an AR7000 and I would like to upgrade the default batter packs for the TX and RX.

Here are the specs of the default packs

Rx Pack 4.8v 1100mAh NiCd

Tx Pack 1500mAh NiMh

Has any of you upgraded these packs before and what did you use?
Do they make higher mah packs for these?
Old 05-18-2008, 11:37 PM
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ChuckW
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Default RE: Battery upgrade for Spektrum

You can easily upgrade. Just choose a pack of the correct voltage in a larger capacity. On the transmitter pack, make sure it is the same cell size and configuration so that it fits.

Here is one source, there are plenty of other as well: http://www.hangtimes.com/nobsbatteries.html
Old 05-19-2008, 09:11 AM
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Missileman
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Default RE: Battery upgrade for Spektrum


ORIGINAL: cdw21

Rx Pack 4.8v 1100mAh NiCd

Tx Pack 1500mAh NiMh
Are these the packs you have now?
They don't need upgrading. People upgrade the packs when they come with 600mah batteries but the ones you have now are more than enough.
Old 05-19-2008, 09:45 AM
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2slow2matter
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Default RE: Battery upgrade for Spektrum

The DX7 should have come with a 1500 mah battery, and the rx battery that came in the package is 1100 mah, so you are not really upgrading...
1500 for the radio is plenty, I usually fly all day on one charge.
Old 05-21-2008, 10:41 AM
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cdw21
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Default RE: Battery upgrade for Spektrum

Missileman and 2slow2matter,

Yes the TX pack is probably just fine for all day flying but with my RX pack 1100mah I only seem to be able to get 5 or 6 10-12 minute flights out of it before my Expert Electronics V-300 Voltmeter goes to the first yellow LED. I am flying a Kadet LT-40.
Old 05-21-2008, 11:04 AM
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Default RE: Battery upgrade for Spektrum

I switched over to A 6 volt 2500 mah RX pack in my students plane. It gave the servos an extra kick and lasts all day. He has the same radio as you with the digital servos and the RX battery wasn't lasting more then A few flights before it needed charging. He has five servos in his plane so his power draw is higher then yours and it's A little 40 size stunt plane so he is putting more strain on the system too.
Old 05-21-2008, 01:38 PM
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Default RE: Battery upgrade for Spektrum

Upgrading from 1100 to 1500 will help, but will most likely result in two, MAYBE three more flights before re-charging. Go to 2000 mAH or similar if you want to fly all day long. If weight isn't an issue, get a big sub C cell battery. You can fly all weekend on some of those.
Old 05-21-2008, 04:44 PM
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Default RE: Battery upgrade for Spektrum

Check out these receiver packs:
http://www.all-battery.com/index.asp...ROD&ProdID=886
Old 05-21-2008, 09:37 PM
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cdw21
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Default RE: Battery upgrade for Spektrum


ORIGINAL: Missileman

Check out these receiver packs:
http://www.all-battery.com/index.asp...ROD&ProdID=886
Holy cr.....ap, are you kidding me only 10 dollars for this battery! Theres gotta be something wrong with this picture here....

Have you ever used one of these batteries before? I notice that this is a NiMH pack, the one that I currently have is a NiCd. Does it matter? Why would spektrum supply NiMH for the TX and NiCd for the RX.

If it doesnt matter then Im all over this pack and gonna order it!
Old 05-21-2008, 11:44 PM
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Default RE: Battery upgrade for Spektrum

Only difference I have found between the two types of batteries is the nimh doesn't like to be fast charged or quick field charged, they don't like the heat. I get more life from the nicds, I field charge quite A bit.
That deal sure looks good to me but depends on shipping cost.
Old 05-22-2008, 05:51 AM
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Default RE: Battery upgrade for Spektrum

With any 'cheap' batteries, construction comes to mind. The tabs between cells must be solid, meaning not done with economy in mind. Check RadicalRC.com and they have a rather lengthly FAQ page that answers a lot of questions about batteries.. truths and myths. The welded tabs between cells must be done correctly or the inside of the battery enclosure will be compromised. If that happens, the battery pack may not last very long and may fail at the worst possible time.

Don't go with cheap battery packs at all no matter what the incentive is. Cheap is cheap. Period. Go with quality, brand name battery packs that are constructed right.

Imagine a welded tab coming loose on your receiver during flight. What happens next? If you paid 500 bucks for the plane-engine-radio combination then what? You've paid 10 bucks for a battery that just cost you $500 bucks because of a lost/crashed aircraft.

CGr
Old 05-22-2008, 07:06 AM
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Missileman
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Default RE: Battery upgrade for Spektrum


ORIGINAL: cdw21


ORIGINAL: Missileman

Check out these receiver packs:
http://www.all-battery.com/index.asp...ROD&ProdID=886
Holy cr.....ap, are you kidding me only 10 dollars for this battery! Theres gotta be something wrong with this picture here....

Have you ever used one of these batteries before? I notice that this is a NiMH pack, the one that I currently have is a NiCd. Does it matter? Why would spektrum supply NiMH for the TX and NiCd for the RX.

If it doesnt matter then Im all over this pack and gonna order it!
I have just got 2 of them but I haven't flown them yet. I have heard good reports on these battery packs.

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