Last month I bought the Samsung’s latest launch Galaxy Tab3 311. It has an 8 inch screen with 1.5 GHz dual core processor. (More details here). However, within a fortnight of purchasing the device, it began showing charging problem. On primary investigation I found the problem was with the USB charging adapter which came with it (The device would charge from other Samsung mobile chargers while the adapter won’t charge any other mobile/ device.)
For a remedy came the idea of charging it via my laptop and so with much pleasure I connected it with the laptop and alas… it won’t charge and instead showed a red colored cross mark over the battery level symbol. On this I Googled to check if anyone else had the same issue? Some had, but they all were related to Tab 2. But on reading the problem description and proposed solutions I knew this might as well be the case with me.
Now let’s come to the actual problem. If you happen to read the adapter input output reading for the Galaxy Tab3 311, It says Input voltage range of 150-300V while the output voltage is 5V. However the interesting part is the output current parameter where it says to be of 2A (Ampere). And this is the problematic part. On searching in the market for alternate adapter I could not find any which would have these output parameters, specifically the current value. And also the usual laptop USB 2.0 port provides a current of approximately 500mA range. This is rather low to start charging a tablet.
If you really wish to charge your Tab from your laptop, simply switch it off and now connect it to the laptop. It should begin charging the battery (However at a very slow rate, I had to wait for about 6Hrs for only 75% charging, but then it’s better than nothing.)
Hope it helps. 🙂