Fun, Learning, Friendship and Mutual Respect START  HERE

Go Back   HeliFreak > R/C Helicopter Support > Walkera Helicopters

Walkera Helicopters Walkera Helicopter Support

LinkBack Thread Tools Display Modes
Old 04-24-2013, 08:19 AM   #1 (permalink)
Registered Users
Posts: 3,005

Join Date: Mar 2012
Default TX Charging question

I have a Devo 7E and 8S. I use AA sized NiMh batteries in them. I had been taking out the batteries to charge in a separate charger, but found a transformer that I could plug into the back of the transmitter to charge the batteries.

The manual is a bit thin on charging the batteries, so I had a couple of questions.

1 - I have a 400 mA transformer and the TX states 200mA. I don't think that this is a problem, but wanted to double check.
2 - How do you know when the batteries are fully charged? Is it smart enough to shut off charging? Or do you just plug it in for an hour when things are low and then unplug it?
3 - For using a sim, can you just plug it in so you don't drain the batteries?

Thanks in advance.
P Max v2, G570, G500 speed, Oxy 3+, P380, XK K110, Open-TX
JWeber is offline        Reply With Quote Quick reply to this message
Sponsored Links
Old 05-06-2013, 07:08 AM   #2 (permalink)
Registered Users
My HF Map location
Join Date: Jan 2010

1. The current rating is a maximum and it doesn't matter if you draw less from the power supply. Note that if the supply is unregulated, the output voltage will be higher at lower currents.
2. I leave the charger plugged into my Devo 6 most of the time since the charge rate is low and NMH batteries can take a trickle charge indefinitely. I don't know what the charge rate is on your transmitters, though.
3. No problem keeping it plugged in during simming. With my 6 I don't find it necessary since I have the output power set very low for sim model. I'm not certain but many transmitters turn off RF when the trainer port is used anyway.
V120D02S x 2 :: Mini Protos x 2 :: Align Trex150 :: Proto X nano quad
Devo 6 with Deviation flies them all!
Jazzjohn is offline        Reply With Quote Quick reply to this message
Old 05-10-2013, 07:32 PM   #3 (permalink)
Registered Users
Posts: 1,696

Join Date: Apr 2010

When you are simming... or anytime something is plugged into the trainer jack, the Tx is not using the RF (radio frequency) transmitting circuit, and so the power usage is much lower than when you are flying for real, outside the sim. (as Jazzjohn said).

I've had several weeks, sometimes a month or more, in between charges when I'm just simming and not flying. Especially when using Eneloop batteries. ...and I sim almost every day.

The batts last a very long time when you are using the sim. I wouldn't bother charging while you sim.

rojack is offline        Reply With Quote Quick reply to this message

Quick Reply

Register Now

In order to be able to post messages on the HeliFreak forums, you must first register.
Please enter your desired user name, your REAL and WORKING email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself. Use a real email address or you will not be granted access to the site. Thank you.
Email Address:
Where do you live? ie: Country, State, City or General Geographic Location please.
Name and Lastname
Enter name and last name here. (This information is not shown to the general public. Optional)
Helicopter #1
Enter Helicopter #1 type and equipment.
Helicopter #2
Enter Helicopter #2 type and equipment.
Helicopter #3
Enter Helicopter #3 type and equipment.
Helicopter #4
Enter Helicopter #4 type and equipment.


Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Copyright © Website Acquisitions Inc. All rights reserved.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

SEO by vBSEO 3.6.1