How much generated heat is acceptable? I just bought this and it generates a lot of heat when charging. May return.
1808682
I have bought 3 like items including one which was claimed to be certified by Qi for my i747 att s3. All of them got interference from the factory factory batterys nfc antenna. None worked with battery on top of it. sorry.
1808683
I think is normal I use it to charge my wife's GS3 and my LG G2, both get hot, mine a lot hotter, but still change without problems.
1808684
Mine does not generate much heat. Phone remains comfortable to touch after a full charge. If it is too hot to handle, I would return.
2148098
Mine has not gotten too hot. I use it to charge my IPhone and IPad at the same time.
428774
No, it's not normal, you should send it back, mine has always charged to 100% in the 3 months that I been using it.
1486251
I would definitely say that the unit or the battery you are trying to charge is defective. Mine gets warm, but not even close to frighteningly hot!
148321
When just charging it is ok but if you are using the laptop and plugged in then yes it gets hot, so does the laptop!!
414285
I charge two devices at once and it stays cool to the touch. I believe it won't get hot if it's well ventilated.
1486246
Mine doesn't overheat but it doesn't completely charge the batteries. I quit using it and bought 2 more of the type of chargers that come with tools.
309046
My radio gets warm when charging which is normal when charging most batteries. But it does not get excessively hot.
414283
No, I've had two devices plugged in for hours and it does not get overly warm. As with any charger it will get warm, but, it should not get hot.
69796
I'm not a battery expert, but you should really stick to the charging voltage and initial current they show on the battery. Overcurrent will certainly warm it up and it may leak or explode on you, or just shorten it's life.
135878
A lot of times gps features in cell phones will make them get hot when powered on. Doubtful this has anything to do with charger. I would make sure output matches that of your phone's original charger.
2096028
Yes, this is normal for lithium ion batteries. Charging and discharging will always result in some degree of heat output.
2148099
I just touched mine with a tablet and 2 phones charging currently and it is not even warm.
414280
I have had this plugged in for both an iPad and an iPhone at the same time over night and have never noticed a heat problem. Hope this helps. I use it all the time.
797749
Im not sure if its healthy or not but its happening because electricity is being transferred and with it being in an enclosed space (your purse) the heat from it charging your phone has no were to go so it continues to build hotter and hotter. If I charge my phone while it's in my purse I normally have the battery inside my purse and the phone in and outside pocket. That seems to work really well for me. :)
859567
As far as cold weather performance, I'm now disappointed. I tested it today with both the car and the just-charged powerall cold, at -15°C (5F). It doesn't work. But there could be something wrong with mine and maybe it's not fully charged. While charging, it stayed at the 3-led level for 4 hrs. So I dis/reconnected charger, and suddenly it goes to 5 leds and stops. Something's weird.
1164819
I have not had an issue with this unit overheating. I have taken it from NYC to London, to Sri Lanka to Malaysia, and no problems. It works fine and charges my phone over and over again before having to recharge the Universal External Unit.