[510 accessories]

just do the math perhaps? 

4 e.g. u got a 2.5ohm bulb that works on 2A, so the voltage would be 5v and boom u got the watts. 10W.

[New dna250 build only working while pluged into USB]

got a blown power ctrl ic? that tiny black square with 4pins on each side. i once had this symtom and fixed it with a same ic. the reason y i know where the problem is was because i was testing it without casing at the very moment so that ic just failed with a terrible red flame flash. it was just literally burnt

[Boxer 167 showing one battery 0%]

well i now that quite well. uv got a disconnection on one of the balancer wire. or broken wire lets say.

[Check battery at 28%?]

在 Saturday, July 15, 2017 在 PM11点37分, Wayneo说:

Highly unrealistic for this mod.

2.7V is perfectly fine for round cells. That's the soft cell cutoff.

Well I totally agree.... What kinda tiny cells can be fitted inside that poor space...

But I am always working with lipo so sorry about the lack of exp with li-ion and ur words were really out of my knowledge. Is Li-ion really that tough? No offense, just pure curiosity:)

[Let's see your 250's!]

Well I must say the only way to push this chip to the limit is to Craft your own mod.

Just like this GIANT mod featured with a MASSIVE 4900mAh 11.1V (54.49Wh) Li-po power set.

But I just didn't notice the size and weight it's gonna be untill I put the battery set inside........

and all of a sudden I was like, is it such a waste of this massive power storage?

so I bought a 12v to 5v USB chip and got this done:

a little bit flaw there but that doesn't matter.

SO i got this shit

Aluminum casing with hand drilled-filed holes, carbon skin and a little bit rainbow deco.

I call it

SA250W Carbon Deluxe

also can be used as an emergency power supply~~~~~(no one cares but my phone with a poor battery)

[Check battery at 28%?]

Well, I've recently made a DIY mod all from raw materials but the chip set, and the battery set I am currently using is a 4900mah 11.1V Li-po (54Wh) set. The maximum current output turns out to be 100 amps without overheating, as the short test has shown. However my very first try was 3 18650, as same as your mod, witch turns out to be having the same issue.

SO modify your mod and replace that 18650s with Li-po. 'Cause tuning the cut-off voltage down to 2.7v is actually killing your power supply.

Not a native speaker, sorry about the terrible english