sigelei 150 watt with Samsung 25r @ 150 watts safe?

[spawn]

Ok. If you are dissipating 150w into a load with fully charged batteries that's 150/8.4v = ~18A. That's though both batteries, each is delivering 18A. Take into account some inefficiency and work on say 20A. Given 20A is the continuous rating for those batteries you're good to go.

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[KenD]

Ok. If you are dissipating 150w into a load with fully charged batteries that's 150/8.4v = ~18A. That's though both batteries, each is delivering 18A. Take into account some inefficiency and work on say 20A. Given 20A is the continuous rating for those batteries you're good to go.

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No device is 100% efficient though, and even with an efficiency of 98% you're exceeding the capability of the batteries when they are discharged to 3.8v.

 

[jwleonhart]

If people are constantly exceeding these batteries capabilities then why is a 150 watt mod or even a 260 watt mod that I've seen available? Wouldn't that be dangerous? For example does the sigelei 150 watt or ipv3 have safety mechanisms in place to ensure the battery will not go into thermal runaway or overheat and vent?

 

[Spencer87]

I wondered about this actually in terms of addition, the 8.4 volts of the batteries in series, wouldnt you need to then use that figure to divide, which essentially means the same thing . i mean 8.4 divided by 0.2, is 42 which is still over the Continuous Discharge of both batteries put together.

guess more for mech mods, but... I usually hover at ~0.25- 0.3

mind I have made some 0.6 on my sigelei

 

[spawn]

No device is 100% efficient though, and even with an efficiency of 98% you're exceeding the capability of the batteries when they are discharged to 3.8v.

The specs I can find on the box state maximum input current is 20A, i.e. it won't draw more as batteries discharge (if it has in built limiting).