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I like that the lights only come on when checked instead of wasting power on them all the time. Pressing the button will light up the LEDs and indicate the case’s remaining charge. Four LEDs and a button occupy the bottom rear of the case, just below the Mugen Power logo. On the rear of the case, a conical cutout allows the camera and flash to work unimpeded. A tiny red light next to the port comes to life when the case is charging. A little behind the volume buttons, you’ll find the micro-USB port used to charge the case itself. The Battery Case has cut-outs for all of the buttons along the right-side of the phone: volume, power, and camera. I find it perfectly comfortable it doesn’t fatigue me a bit. As a gamer, I’m used to holding controllers that weigh just as much as a 920 with the 4700 mAh case on. The extra weight could be a concern for some users, but not this guy. The extra size doesn’t make the phone too hard to pocket or anything, though it’s certainly hard to miss when looking at the phone. It adds a significant depth to the phone and a noticeable amount of weight.
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Power connector issues aside, the Mugen Battery Case is mostly a good case. One won't get into situations where the case is charging itself but not the phone (both can charge simultaneously), unlike the Brando Power Jacket which often stopped charging the phone. No pressing a button to switch to charging mode here connecting the case while it holds a charge is just like plugging in a charger. It allows just more than enough room to connect the case to the phone’s power jack.Īfter plugging the Mugen Battery Case’s male connector into the power jack, the case automatically starts charging the phone. The wire is built into both the micro-USB plug and the inside of the case itself. Pull the plug out of the hole and you’ll find a thin, coiled wire about three centimeters in length. The bottom-left side of the case houses a retractable micro-USB plug that provides power to the phone.Ī hole at the bottom of the case holds the plug snugly when not in use. The bottom of the phone remains largely exposed while inside the case. Unlike the Brando Power Jacket, this case doesn’t cover the bottom of the 920 where the phone’s micro-USB port calls its home. The Mugen Battery Case connects to the Lumia 920 in a most unusual way. But the case certainly helps! Retraction action The phone itself showed some battery drain these cases can’t eliminate the fact that 920s sometimes use power faster than they can charge. With Mugen’s 4700 mAh case, I played Temple Run 2 for five hours (yar, a tad boring) without fully draining the case. After that, you’d better plug in or you’re going to miss some calls. How well does one of these cases extend the 920’s battery life in practical terms? An unenhanced Lumia 920 will likely get 2-3 hours of playtime from a graphically intensive game. The 4700 mAh case I’ve been using exceeds the phone’s standard battery by 235 percent, basically tripling the power it has to work with.
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At 3000 mAh, you’re looking at 150 percent extra power on top of the 920’s internal battery – more than doubling the available power, in other words. The larger capacity case is a few millimeters thicker than the smaller one, and presumably heavier too.Įven the 3000 mAh case will provide more power than the Brando Power Jacket, which has a capacity of 2200 mAh. The price difference between the two is only ten dollars, making the choice between models come down mostly to size and weight. The Mugen Battery Case comes in both 3000 mAh and 4700 mAh sizes. The Lumia 920’s built in, non-replaceable battery holds 2000 mAh of power.