Hello Julian, Charging Li-Po cells is a little bit different but not difficult. I use a multifunction intelligent charger bought from Radio Control players (only US$50 locally). I need to modify a bit on the charging circuity. Don's webpage gives a very good idea in how to do that.
The total cost of 3 x 3.7v 3300mAH Li-po cells is only US$30. Standby current of K2 is around 200ma. Therefore, K2 can be operated for a long time even at its rated power of 15 w. cheers, Johnny VR2XMC ________________________________ 寄件人﹕ "Julian, G4ILO" <julian.g4...@gmail.com> 收件人 elecraft@mailman.qth.net 傳送日期﹕ 三, 10月 14, 2009 9:52:55 PM 主題： Re: [Elecraft] [K2] Re： has the k2 a future? Johnny Siu wrote: > > Upon replacing the Lead acid battery in the KBT2 with Li-Po cells, the K2 > is now very light weight and can be operated for loooong time. It is the > greatest portable rig when compared with the others. > I liked the lead acid battery because it made the K2 feel solid and not move about on the desk, when it was my main rig. Now I have the K3, it is really only a portable and backup rig, so perhaps Li-Pos would be a better option. But I don't know what to do about charging. I made a PSU for my 10W K2 in an EC2 case, and adjusted it to deliver 14.2V output, and it has done a good job of keeping the gel-cell battery charged all these years. Presumably Li-Pos would need a more complicated arrangement. ----- Julian, G4ILO. K2 #392 K3 #222. * G4ILO's Shack - http://www.g4ilo.com * KComm - http://www.g4ilo.com/kcomm.html * KTune - http://www.g4ilo.com/ktune.html Yahoo!香港提供網上安全攻略，教你如何防範黑客! 請前往 http://hk.promo..yahoo.com/security/ 了解更多! ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
