Diamond Geezer Posted January 29, 2011 Share Posted January 29, 2011 Hi Guys Just got a all in 1 charger an ethos need to know what amperage to charge my nimh trannie and reciever packs at thx Quote Link to comment Share on other sites More sharing options...
Tim Hooper Posted January 29, 2011 Share Posted January 29, 2011 Assuming that you're using NiMH cells, then an overnight charge at 1/10C is the accepted rate, although many are happy to charge at 1C if in a hurry to fly! tim Quote Link to comment Share on other sites More sharing options...
simon barr Posted January 29, 2011 Share Posted January 29, 2011 Hello DG. I charge my nimh's at a maximum of half "C", (half capacity), as they get too warm charging at any higher. In other words, I charge my 1000 mah pack at 500 ma maximum. Quote Link to comment Share on other sites More sharing options...
flytilbroke Posted January 29, 2011 Share Posted January 29, 2011 Watch out here, very chancy to charge avove the rate given for the TX pack if in the TX. Usually fuse will pop,,, if you are lucky. Quote Link to comment Share on other sites More sharing options...
Circus Bear Posted January 29, 2011 Share Posted January 29, 2011 Hi Diamond Geezer I Slow charge through the TX at 70-100mA so that the circuitry is not damaged. I rarely fast charge tx batteries but with the battery removed I would go at no more the 1.5A I hope this helps Circus Bear Quote Link to comment Share on other sites More sharing options...
andy watson Posted January 29, 2011 Share Posted January 29, 2011 Theres a table around somewhere, but I can never find it. Think Timbo did it. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted January 29, 2011 Share Posted January 29, 2011 THIS any use ? Quote Link to comment Share on other sites More sharing options...
seecomber Posted January 30, 2011 Share Posted January 30, 2011 I must admit that I and many at my club regularly charge at the field at 1C leaving the battery in situ in the Tx and using the inbuilt charging jack. I have always assumed that with the Tx switched off none of the circuitry of the Tx is involved and the jack is connected direct to the battery although it may use the track of the PCB for part of the circuit.Is this not the case? The Tx is a Futabu and it is not particularly convenient to disconnect the battery in the field and even more awkward to reconnect it as the pins on the circuit board are well inside the Tx casing. If there is a real danger of damage by charging at 1C via the charging jack I will fit an extension to the internal battery connection so that disconnection and reconnection of the battery is more convenient. Quote Link to comment Share on other sites More sharing options...
Circus Bear Posted January 30, 2011 Share Posted January 30, 2011 hi seecomber, i have seen on many occasions mostly futaba charging at high rates through the tx can cause serious damaged the charging circuit. I would strongly advise removing the battery for fast charging. The circuitry is not designed for high current loads. I understand it can be inconvenient but given the risk its not worth it, in my opinion. Regards Circus BearEdited By Circus Bear on 30/01/2011 18:59:23 Quote Link to comment Share on other sites More sharing options...
seecomber Posted January 31, 2011 Share Posted January 31, 2011 Thank you Circus Bear. In view of what you say I have now fitted extensions to my Tx`s circuit boards to facillitate easy detachment of the batteries for charging. Quote Link to comment Share on other sites More sharing options...
JayCee Posted January 31, 2011 Share Posted January 31, 2011 Ho Dear. Have always charged my Futaba 6EX through the charging jack at 1C 2.2 amps!! Must admit the case does get a bit warm but up until now have had no problems! JC Quote Link to comment Share on other sites More sharing options...
Andrew Jarvis 1 Posted January 31, 2011 Share Posted January 31, 2011 I remove my TX battery before charging, I do all my batteries at 1C have done for the last 10 years and I can honestly say I've never had any problems modern batteries are designed to be fast charged, to be honest I could never see the argument against, in the days of Nimh and Nicad flight packs for electric models you would happily fast charge these so why non your flight pack in your IC model or TX? Quote Link to comment Share on other sites More sharing options...
Circus Bear Posted February 1, 2011 Share Posted February 1, 2011 Its not that batteries cannot be fast charged, its that the circuit within the tx is so thin it could just burn up if fast charged through the tx. Quote Link to comment Share on other sites More sharing options...
Andrew Jarvis 1 Posted February 2, 2011 Share Posted February 2, 2011 Posted by Circus Bear on 01/02/2011 11:04:46: Its not that batteries cannot be fast charged, its that the circuit within the tx is so thin it could just burn up if fast charged through the tx. That's why I remove the battery. Quote Link to comment Share on other sites More sharing options...
Circus Bear Posted February 2, 2011 Share Posted February 2, 2011 Sorry Andrew I miss read your post :s Quote Link to comment Share on other sites More sharing options...
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