Charging LiPo Transmitter Battery - Page 3 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 03-15-2010, 04:13 PM   #21
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I am: Jeff D
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Re: Charging LiPo Transmitter Battery

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I have mixed feelings towards the switching regulator. On the plus side you will see an increase in run time between charges since the regulator is not wasting energy in the form of heat. You would even see this with the stock battery. On the down side, your TX always shows the same voltage and does not give you an indication on the remaining battery capacity. Also, this requires soldering inside the TX and would void any remaining warranty. This type of mod will not work on all radios.

Originally Posted by moo View Post
I have used a 3s LiPo pack in my Futaba 7c, no regulator and no diodes, for a while now, and will switch the 9z to Lipo as well when it needs a new pack, but I think I'll buy an adjustable switching regulator for that radio, besides it's very heavy already.
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Old 03-22-2010, 01:54 PM   #22
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Wink Re: Charging LiPo Transmitter Battery

Received my Zippy battery today. Took me 15 minutes to solder in the 2 diodes. Cost was $0.40 for the two diodes and $0.10 for the shrink tube. Voltage was dropped 1.5 volts.

I'm happy that my transmitter is now protected.
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Old 03-22-2010, 03:51 PM   #23
I am: Philip A
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Re: Charging LiPo Transmitter Battery

Just heard an unfortunate story on the weekend. Another RC'er swapped a lipo into his Spektrum TX. He charged the battery while it was still in the radio and left for a short period of time. You can guess what happened next: both the transmitter and the battery turned into a smoldering pile of melted plastic.

Lesson learned: Don't charge batteries (lipo or otherwise) while installed in a TX or a plane.
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