Great but heater

Hello,
I bought this charger to replace the one that I had not suit me.
This one is perfect. My old charger put up 24 H charge batteries and still not even fully.
On it is written in 2 hours charger, but this is a function of power batteries, batteries for my 2700 mAH it takes about 3H.
There are 3 LEDs:
1 LED indicates that charging
1 LED indicates that it is finished loading in full
1 light indicates that batteries are defective

plus 1 LED battery
when battery light flashes is that the battery is charging, when it stays on is that the battery is charged. That's because when the batteries are charged more than vites else can be seen, remove and put other battery to load.

You can put 4 AA or 4 AAA batteries
Only drawback to the device is that it gets very hot. For my part I put it on a raised metal object so that air passing underneath. But do not get excited, all the heaters chargers.
I suggest you this article