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Fast charge for a JR 8103 DT Radio

Old 11-29-2007, 11:22 AM
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alfredbmor
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Default Fast charge for a JR 8103 DT Radio

Hi:
I have this radio (JR 8103 DT Heli version) and I want to know if I can charge my radio batteries with a fast charger using the normal charge receptacle (The one installed on the side of the radio). I plan to charge my batteries up to 2C.
Thanks.

Old 11-29-2007, 03:37 PM
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tadawson
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Default RE: Fast charge for a JR 8103 DT Radio

Stock battery, or ? ? ?

- Tim
Old 11-29-2007, 03:48 PM
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Default RE: Fast charge for a JR 8103 DT Radio

If I remember correctly, the stock battery is a 600 mAh battery. Charge at 2C would pump 1200 mAh thru the system. If I remember correctly, the fuse in the TX is a 1.3A (1300 mAh) fuse. I think that would be too much for the fuse.

Take the battery out and charge.

But, Why do you need to charge at 2C?

Rafael
Old 11-29-2007, 04:13 PM
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Default RE: Fast charge for a JR 8103 DT Radio

Sometimes I can't put on charge my radio the day before going to the field and I got this new Hyperion charger which have many features and that allows me to charge the batteries at the field. I have soldered a servo connection to the battery to be able to charge taking it apart from the TX but I also wanted to know if I can charge the battery with out the task of pulling out the battery. I do not want to mess with the battery board connector or damage the connector.
Jim yes is the stock battery.
Rafael: I think that is the fastest and safer way to charge (2C), do you know how much time can take to charge it at 1C?, maybe I can charge it at 1C over the stock receptacle with out blowing the fuse.
What do you think?

Thanks.
Old 11-29-2007, 05:13 PM
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Default RE: Fast charge for a JR 8103 DT Radio

The fuse is rated at 3A, however.... I regularly charged my packs at a 1A rate without any issues.
Old 11-29-2007, 06:37 PM
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Default RE: Fast charge for a JR 8103 DT Radio

Thanks Mac Man, How long does it take?
Old 11-30-2007, 04:55 AM
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Default RE: Fast charge for a JR 8103 DT Radio

Depends on battery pack size, how much you have taken out etc..... As I use transmitters for test purposes as soon as the alarm goes, I usually whack it on the fast charger and wait till that alarms at me telling me that it has finished. A 600mAH stock NiCad will usually be ready after about 35 - 40 minutes.
Old 11-30-2007, 10:41 AM
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Default RE: Fast charge for a JR 8103 DT Radio


ORIGINAL: alfredbmor

Rafael: I think that is the fastest and safer way to charge (2C), do you know how much time can take to charge it at 1C?, maybe I can charge it at 1C over the stock receptacle with out blowing the fuse.
What do you think?

Thanks.
Charge at 1C will take 1 hour, as that is the definition of C (Capacity) Your battery is rated for 600 mAh. mAh = miliAmpere- hour, which means that it will deliver 0.6 ampere for one hour (theoretically). So if you charge it at 1C, 1 times the capacity, a fully discharged battery will be charged in 1 hour. At 2C, the battery should be charged in 1/2 hour.

Remember that charging NiCds at anything over 1/10 C is going to reduce your battery life, unless the batteries are rated for fast charge, and even then battery cycles are reduced.

Rafael
Old 11-30-2007, 12:59 PM
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Default RE: Fast charge for a JR 8103 DT Radio

Thanks, it seems to me that it is a fair time to wait and safe for my radio. I will be soldering the plug taking take of the polarity and labeling for a JR purpose.
Thanks again guys.

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