The trend continues and the VTC4 is depleted first, followed by VTC5, and the 25R lasts the longest. Unfortunately the VTC4 has lower mAh so it doesn't have the staying power. The VTC4 is a 30A battery while the other two are 20A batteries, and at this moment the current is around 16A so you can see that the VTC4 has an easier time with it. You can see that the VTC4 can handle these high currents a bit better than the others, giving a higher loaded voltage (less sag). This is an interesting one because the nominal battery voltages are all about equal so you can see the difference in voltage sag under load. By 200 seconds we see the trend that will hold for the whole test - the 25R just slightly better than the VTC5, and the VTC4 still performing strongly but at a little lower voltage.īelow is a pulse pretty early in the test, about 2 minutes in. So let's look at the first part of the test in more detail:Īgain we see that the VTC4 starts off stronger in the beginning while near full charge, but its lower mAh rating means that it can't keep that up for long. The overall results are the same as the mechanical load test - all batteries handle it great but the 25R lasts the longest, followed by the VTC5, followed by the VTC4. Here's an overview chart of how the test turned out: So in a mechanical mod you're being hardest on your batteries when they're fully charged, in a regulated device you're being hardest on them when they're low on charge. Regulated devices work backwards of the way mechanical devices do - whereas in a mechanical device power and current decrease as the voltage drops, in a regulated device power stays constant and current increases as voltage drops. This will mean current levels will vary from 16.6-21.8A, per battery. This is done from full charge (4.2V) until the voltage goes to 3.2V. The device is fired for 3 seconds, then turned off for 8 seconds, then repeated. As you know, if you add multiple batteries in series or parallel in a regulated device then they share power loads equally so if you had two batteries this would be like having a 140W device (under ideal conditions of course). This test simulates a constant watts device with one lithium ion cell at 70W. So how do the 25R, VCT4, and VCT5 perform with 70 watts? The Test: 3 second load pulses of 70 Watts After verifying there wasn't a huge difference, the data for the new ones will be shown below. All batteries we tested at least one new one as well as a couple that had been lightly used and stored for a bit. The Samsung 25R is the new green Samsung, the 25R5. The test will be at the top end of the rating of the Samsung and the VTC5 (they are rated 20A continuous), while being mid-way through the rating for the Sony VTC4 (pretty much the only battery that's truly rated for 30A continuous). Just like last time, the batteries under test are the Samsung 25R (full part number INR18650-25R), the Sony VTC4 (also known as VCT4, full part number US18650VTC4), and the Sony VTC5 (also known as VCT5. So here are some results for some of the best batteries. Unlike mechanical mods, regulated devices use a constant power output instead of a constant resistance load. After last week's test results on 0.2 ohm constant resistance testing (like that found in an e-cig mechanical mod), many readers wanted to know how a regulated device would compare.
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