LG HE4 18650 in a Mechnial Box Mod

[big4570]

Hey all, I've only used VTC 4's and Samsung 25R's so I figured I'd give LG HE4's a try. Obviously with a battery purchase I "had" to buy a shiny new mechanical mod to marry them too. Up until now I've only used a Sigele 100w.

My question is are these batteries safe to use in my mechanical mod (Dimitri Box Mod Clone)? Usually I build to 0.2 - 0.3 ohms but may push this one to around 0.1ohms if its safe to do so.

 

[Baditude]

The Dimitri Box mod is a parallel dual battery mechanical mod.

Used as a pair in parallel, the LG 18650HE4 2500mah 20Amp CDR will deliver a combined 40 amps continuous.

1.0 ohm = 4.2 amp draw
0.9 ohm = 4.6 amp draw
0.8 ohm = 5.2 amp draw
0.7 ohms = 6 amp draw
0.6 ohms = 7 amp draw
0.5 ohms = 8.4 amp draw
0.4 ohms = 10.5 amp draw
0.3 ohms = 14.0 amp draw
0.2 ohms = 21.0 amp draw
0.1 ohms = 42.0 amp draw
0.0 ohms = dead short = battery goes into thermal runaway

Using the above calculations from an Ohm's Law calculator, 0.1 ohm will be over their combined 40 amp limit. Technically, 0.2 ohm would be the lowest build that you could use.

Keep in mind that as a battery ages, the C rating of the battery (amp limit) drops to as much as half of it original C rating. So in effect, a 20 amp battery may become a 10 amp battery.

Everyone is free to set their own parameters, and I can only say what mine are. I try to never exceed 50% of the CDR (continuous discharge rating) of a fully charged battery (4.2v). So with a 20 amp battery, that 50% would be 10 amps continuous.

Also keep in mind that a loose post screw can cause a coil resistance to drop by as much as 0.5 ohms (from personal experience). Good reason to not build extremely low resistance coils. Because I'm a safety buff, I personally will not build lower than 0.6 ohm for a mech.

 

[Thrasher]

I use some he2 n he4 in mechs, they are abused daily- I think the discharge pattern runs pretty steady and hot. But when they are done it seems to fall fast. Good cells! running .4 to .6 on a single cell day in day out.

Duals should run great.

 

[Libbydude]

I've only had 1 he4 battery. Maybe I just got a bad one but I wasn't impressed. I had a six month old efest that was better and no match for my 25r's.
I use the he4 for tootle puffing or in my ipv mini 2.

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