Product review: Qi-infinity™ Portable Wireless Charger Power Bank 4000 mAh by Qi-infinity

My husband immediately liked this battery for its shape. It is just the right shape to fit into his breast pocket behind the phone. Because the battery is fairly thick it forms a tight fit in the pocket and keeps it against the phone and charging. He is about to go to a conference where in the past years he spent so much time on the phone that he drained the phone battery. He plans to keep the phone constantly charging in his breast pocket.

This wireless charger can charge a phone while the battery pack is plugged in and charging (i.e. charge through charging). This charger can work in wireless and wired mode. It uses a standard micro USB cable when it is charged in a wired mode. I have a strong preference for standard cables, so I don't need to worry about losing a proprietary cable.

Its sweet spot is not huge (I demonstrate it in the video). The battery pack is smaller than Nexus 5 in size so you need to pay attention on how you place the phone on the charger. This is the second charger we have with the shape and thickness that works in my husband's shirt pocket. The other battery (IQ Stone+) has a slightly larger sweet spot and it charges the phone in the shirt pocket a little more consistently (meaning the phone does not move off the sweet spot).

The power pack size is 2.75" x 4.125" x 0.5". It weights 4.6 oz.

How I tested the wireless charger:
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I tested the charger with a current monitor to see what current it is drawing. I also did a 10 minute charging test which I run on all chargers I test to compare how much the phone was charged in 10 minutes. In addition, I timed the charging speed when the battery charged two phones (one wireless, one plugged in). Since the charging speed is non-linear I start charging each device from approximately the same charge level.

✔ Wireless Charger (phone not charging)
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current monitor: ~~~~~ 0.51A (i.e.USB rate charging the battery pack)

✔ Wireless Charger (Nexus 5 phone charging)
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7% change in charge in 10 minutes (Excellent!)
current monitor: ~~~~~ 1.19A and 5.17V
(for comparison, for the fastest charger I own the current monitor for Nexus 5 shows 1.42A/5.21V)

✔ Wired Charger (Samsung Nexus phone charging)
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6% change in charge in 10 minutes (Excellent!)
current monitor: ~~~~~ 1.02A and 5.20V
(for comparison the best charging monitor result for this phone is 1.00A/5V)

This wireless charger provided by Q-infinity.

My husband loves this wireless battery pack, because it doubled the life of his phone battery when he carries it in his breast pocket and it charges quickly.

You can find it on Amazon by following this link.



Ali Julia review ★★★★★