Hiroki, here is a link to a 12V battery that a lot of people use for the QMX. You don¡¯t want to play ¡°Russian Roulette¡± with a 13.8 V battery and your new radio. Here is the link. Talentcell Rechargeable 12V 3000mAh Lithium ion Battery Pack
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Also, The QCX mini that I built had a manual that included a ¡°cheat sheet¡± for getting through the menu system. I looked through the manual for the QMX and it didn¡¯t have a cheat sheet. I¡¯m going to do a search and see if someone has come up with one. I know SOMEONE must have. It would be too painful to have to go through the menu each time ?without one.?
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Hiroki, here is a link to the QMX manual for firmware firmware 1.00_026
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QCX mini manual ? ? On page 52 there is a cheat sheet.?