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Batteries & Chargers Discuss Li-P, Li-Ion, NiMh, Nicad battery technology and the chargers that juice 'em up!

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Old 09-07-2012, 11:49 PM   #1
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Default Battery compatible?

I rec'd my blade scout-rtf-3-ch-heli-today and the xmtr uses AA batteries, not rechargeable type, and I'm wondering if I can use
Rechargeable batteries in the xmtr...?? I have some AA 1.2v 2100mah NIMH batts...the AA that came with xmtr say AA q.t Merc/Cadmium...
Is it safe to use the rechargeable?? Would save me some bucks in
replacing the standard AA's....
thanks
don
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Old 09-08-2012, 12:10 AM   #2
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Likely no problem. Alkaline start out at 1.5v and have a linear drop as they discharge.
Most better TX use NiMh rechargeables. Those start out about 1.4v freshly charged, drop pretty fast to 1.3v, and stabilize out a long time @ 1.2v. They are about dead at 1.0v. When they near that level they drop FAST, so don't let them get to close to that. If the TX has a low battery warning level pay attention to it.
Since they are NiMh it won't hurt to recharge on a regular basis to be safe.

fly
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Old 09-08-2012, 12:16 AM   #3
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Thanks...I've had these batt's awhile, but recharge them fairly often,
so they ought to be in good shape..and will keep an eye on the low
batt lite...
don
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Old 09-08-2012, 12:26 AM   #4
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The best of those kind of batteries is the Sony Eneloops. They don't self-discharge like the older variety.

fly
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Old 09-08-2012, 08:24 PM   #5
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Originally Posted by baron2010 View Post
I rec'd my blade scout-rtf-3-ch-heli-today and the xmtr uses AA batteries, not rechargeable type, and I'm wondering if I can use
Rechargeable batteries in the xmtr...?? I have some AA 1.2v 2100mah NIMH batts...the AA that came with xmtr say AA q.t Merc/Cadmium...
Is it safe to use the rechargeable?? Would save me some bucks in
replacing the standard AA's....
thanks
don
Should not be a problem. Might be a good idea to range check your system, both with brand new AA Alkaline cells and Nih cells to see if any difference shows up.

If no difference, you are good to go.

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Old 09-08-2012, 08:31 PM   #6
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This appears to be your unit:
http://www.horizonhobby.com/pdf/BLH2700-Manual_EN.pdf

There is no low voltage warning on the TX plus the TX batteries are also the charge power. You need to take that into account with use.

I use a similar unit on my heli but not for charging. It does fine with NiMh. It is NOT a long distance TX and it's a tiny heli anyway. Not sure if there is a 'range test' option available. As long as the batteries are decent, it'll be fine.

fly
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Old 09-08-2012, 08:59 PM   #7
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The xmtr has a "beep" alarm that goes off while flying if tx batt's are
low on charge, also it sez if flight batt takes long to charge than 30 mins
to replace tx batt's....will keep an ear/eye out on them...
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Old 09-09-2012, 01:18 AM   #8
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Originally Posted by baron2010 View Post
also it sez if flight batt takes long to charge than 30 mins to replace tx batt's....

What the heck does one have to do with the other??
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Old 09-09-2012, 04:19 AM   #9
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The little Blade Scout uses the transmitter battery to charge the
flight or heli battery.
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Old 09-09-2012, 04:52 AM   #10
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Oh my God.

Sorry, I don't know anything about toys.
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Old 11-20-2012, 03:47 PM   #11
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Originally Posted by Andrew111 View Post
... because every battery have different capacity and some of batteries are more power and some of less power...
It would be nice if it were even that simple. Companies realized years back they can fire the engineering and R&D Dept. and bulk up Marketing. They invent specs and print bogus info. There are NiMh AA out there claiming to be 3000mA. They are complete crap. Most of them at 2500mA and higher are very suspect. Same is true in 18650's and a whole host of other batteries.

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Old 11-20-2012, 05:44 PM   #12
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Originally Posted by flydiver View Post
It would be nice if it were even that simple. Companies realized years back they can fire the engineering and R&D Dept. and bulk up Marketing. They invent specs and print bogus info. There are NiMh AA out there claiming to be 3000mA. They are complete crap. Most of them at 2500mA and higher are very suspect. Same is true in 18650's and a whole host of other batteries.
Yeah
Last year I caught a club member flying his model with a 2700 Mah Nih battery pack, bought on the cheap. He was lucky to have not lost the model, since I tested that battery pack with the servo load his model put on that battery pack. The voltage dipped to 3.6 Volts DC when all servos were moved back and forth. (That was measured with my $350 Fluke 87V digital meter with its one millisecond response time min/max voltage reading capability)

Oh, forgot to mention, the model was a multi-thousand dollar wet turbine model.

He, along with many other club members are now using either the LiFe or A123 batteries as receiver power. Those type cells can easily handle the worst peak current levels any resonable receiver/servos can pull. In fact, the 2300 Mah A123 cells will burn up the servo wires before their voltage drops below safe levels.

DennyV
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