The main problem with using that trustfire battery (besides the low quality of that brand) is the fact that it is not a high drain battery. The DNA30 can draw up to 12 amps from a battery and that trustfire battery might be able to output 3 amps if your lucky. When pushed to hard that kind of battery has been known to catch fire and vent. The sony battery that they recommend is a 30 amp battery which will output that 12 amps without breaking a sweat.
The trustfire battery might work at lower power settings, but I personally wouldn't risk such an expensive mod over a $10 battery.