@ Southee: On a freshly charged battery (4.2V) and with a 1.1ohm build, your pulling 3.818182 amps, far within safety for that battery. However at .5 you would be pulling 8.4 amps, still 1.6 below the 'limit' but I prefer to stay 5-10% away from my limit, just for safety. VTC5's have a 30 amp limit (I'm talking continuos, not pulsing, by the way) which at 4.2V you can SAFELY build a .17 build, which would put you at 24.70588 amps. People push for VTCs because you can build much lower in resistance coils with them, and SAFELY at that. On top of Sony being an extremely reputable electronics supplier. For about $12/each you can't go wrong. Hope this helps.