Hitec 58207 transmitter battery problems - RCCanada - Canada Radio Controlled Hobby Forum
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Old 04-19-2006, 07:15 PM   #1
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Hitec 58207 transmitter battery problems

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Hello, I am trying to bring back the capacity on some hitec 8 cell 600mAh NiCad packs for a friend of mine. They are dying real quick from what he says. One of the two seems to be OK but the other one I am only able to get about 110mAh capacity out of. I cycled it 3 times on the stock settings (my cycler is a Hobbico AccuCycle Elite). Is there anything else I should try or is this one pack a gonner? I think it is about 2 years old, maybe 3.

Also, who makes the cells in hitec packs?

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Old 04-19-2006, 08:02 PM   #2
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8 Cells


The cells are made by Sanyo. Normally, just one cell will develop a short circuit and you can measure each cell with a digital voltmeter. Replace the bad cell or replace the complete batt. pack. Your choice.

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Old 04-19-2006, 08:25 PM   #3
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OK, well the packs are not mine to tear into. Ill have to talk with my friend and see what he wants to do. It probably wouldnt make sense to replace 1 bad cell with a new one, it would be like replacing a flat tire with a 50,000 mile rating on your car when you get the flat after 40,000 miles.. the other ones are only going to last another 10,000 but the new one will go a full 50k

Ill see what my friend wants to do.. probably just replace the pack.

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Old 04-19-2006, 09:39 PM   #4
Wayne MIller
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Tx Battery

Hi Steve,

I usually replace all my batteries with NiMh (Nickel Metal Hydride) batteries of a higher capacity at some point.

In the case of a Tx (transmitter) battery, I use high capacity camera batteries. The Tx is not subject to the vibration of a receiver battery, and therefore I'm not worried about failures. I usually replace the complete Tx pack with high capacity camera batteries (2100mah or 2300mah). These can be purchsed almost anywhere such as Costco or Zellers, and I have never had one fail.

If you are capable, you can solder the batteries and make your own pack, using the original as a wiring example. Note, the original batteries will have "tabs", and you will have to use a small piece of insulated wire instead. You must use a very hot soldering iron. This is so the iron contact to the cell is very brief, as to not heat up and damage the cell. I usually clean the cell end and then give it a light sanding, just enough to scratch it a little before soldering.

Make sure you observe the connector polarity when installing the connector. Typically, the red wire goes on the positive of the battery pack. Make sure you measure the connector output with a meter on the old pack, and then on the new pack making sure they are the same before plugging it in to the Tx.

After soldering, and installing the connector, the pack can be heat shrink wrapped, or wrapped with electrical tape.

If your lucky, and your Tx has room in the battery compartment, you can purchase an 8 cell battery holder, from an electrical store, such as Radio Shack (their new name is The Source) - file down the snap on connector, then solder the connector wires onto them, again check polarity on old and new battery as described above, then put it in the radio, this holder will make it easier to replace cells in the future if you have to.

The cells will take longer to charge with the wall charger, so I typically charge the pack out of the Tx with a fast charger, such as the Hobbico Mark II Field Charger for the first charge. After that I use the wall charger since you won't run them down much. With the new Tx pack, you will be able to run your Tx all day.

If you want to purchase a pack, they can be purchased on line from Hobby Wholesale or Great Hobbies and they usually deliver within the week.

Hope this helps.


Wayne Miller
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Old 04-19-2006, 10:20 PM   #5
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Wayne, thanks for the information. I just replaced my hand held ham radio pack with NiMh cells like that, only I used an 8 cell 720mAh pack that was already made. I tested it a while ago and it lasted being turned on for 3 days strait!

As for soldering directly on to the cells, I believe that is a NO-NO. The cells have a plastic/rubber gasket around one or both terminals to seal the chemicals inside. When you apply heat to that seal it destroys it and the life of the battery will be drastically shortened.

I am IPC and PACE certified for soldering so soldering is a non-issue I just wish I had a micro spot welder to put tabs on new cells Although, you can purchase some cells with the solder tabs already in place - just costs a little extra.

Hmm.. micro spot welder?? might be able to make one out of a 110vac line and a thin piece of music wire (so you dont blow a circuit or light the room on fire ) just hold a tab in place on one of the terminals and ground one side of the 110vac line to the terminal and touch the center of the tab with the music wire on the other side of the 110vac line. Youll get a spark and hopefully it will melt all the way through the tab and into the batery terminal. Then again, 12vdc out of a car battery would probably give enough of a spark to do the same thing. 110 would be tricky

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