Hi

I have seen in Ebay and Amazon this kind of multiple battery charger. Is like a strip that you connect up to 3 battery at the same time using your regular Charger. Since I have several Battery and the time to recharge one take more that the time u fly !!

Can anyone tell your opinion,

They really works?
Have any effects on the battery?

Thanks.

The ones I saw looked a bit sketchy in terms of construction, but they may function well.

I've read that what ends up happening is batteries charge in order (not at the same time) so you may end up with a battery station that just charges one after another.  If they all work this way, sequential charging, then it really isn't much a savings other than queuing up one battery after another and saving you having to connect the next one.  For $39 I purchased a second charger and given the cost of some of the parallel units (~$80) I could add a 3rd.

Plus, they look like they could potentially compromise the delicate battery contacts -- which are the weakest link between the Phantom and the battery.

I agree, just get additional charger(s).  

I bought a multi charger a few months ago.  It will charge the three batteries at the same time. I connected the three batteries about 45 minutes ago, 1 battery was at 25%, second battery was at about 35 to 40% and the third battery was at about 60%.  It brought the first battery up to the second one, then brought up the 2 batteries up to the third one, now charging all three at the same time and it is almost finished.  

http://www.ebay.com/itm/DJI-Phan ... hash=item43c905517e

They all have to be turned on before the charger is connected.  In fact, they just finished so about 50 minutes to charge full all three batteries.