Would there be an issue simultaneously charging one battery that is at say 5% and another that is 65% full? What happens when one finishes first?
319734
Don't think it really matters because in balanced charge mode (I use every time) when one cell reaches 4.20 it will keep charging the others till they hit 4.2... But you must use matching battery's... Same mAh and cell count.... So if you have 'two' 2cell 5000mAh battery's you would charge them at 5.0v coz there both 5000mAh and you would have 4cells in total so choose 4cells on ya charger.. Hope this helps...
319735
If you always set the charger to Balance Charge (which I suggest) there's no issue. But regardless, the charger is set to 4S 14.8 when you charge 2 2S lips, so no worries
50548
The batteries also probably need to be charged regardless of how full a charger says they are. 1st time thing.
764743
YES,NO PROBLEM THERE.You might have a problem with one of the Batteries,Ihave to put a rubber band around it while it charges.
2256135
Yes, possibly at the same time. At least turn one off for a quicker charge.
87041
As far as I know, it should stop charging the battery when it's full. I'm planning on getting an extra battery to swap during trimming. After leaving in my battery for a full charge over a week, I didn't notice any drop in performance.
546984
I don't usually let the battery below 20%. One thing I have learned is that some chargers will burn out a battery if left plugged in continuously. Unplug when charged.
340684
Generally this charger is set to deal with one battery at a time but the charge is generally quick depending on the type of battery you are trying to charge.. I would not recommend that you charge more than one at a time.
609828
It is not recommend to charge a battery at the same time the battery is being drawn on.
1227800
From what I have seen,Yes. Each time I have charged the batteries, the red charging indicator lights turn green when the battery is charged. From what I have heard, the charger does not continue to try to charge a battery that is full.Hope this helps
983685
All Battery chargers can charge 1 at a time. If it was made for 2 battery at a time consumers will be in trouble because if one battery is defective the charger will do you no good.
1390089
Hi: I had that same question. So I just bought the battery thinking that would solve the problem. But it didn't. So I ended up buying the charger and that just prolonged things. MY advice, purchase BOTH at the same time and be done with it. JOHN
649900
Hi. I just test the charger with two devices and they charge without any problem.
1043446
You can charge both at the same time, but its better if you do it separately
775655
I always recommend following charging instructions. The battery may appear fully charged, but almost always isn't.
164167
When you connect them like this, they operating in parallel - same as if you had wired the batteries in parallel yourself. Each battery will receive the same charging voltage. For some batteries, this this will be the correct charging voltage, However, the other batteries could be over-charged or under-charged. All the Battery Tender sees is one battery!This is answered on the Battery Tender website. The explanations are excellent, with clear diagrams. Find this info in the education section - it's a on pull-down tab, at the top of the homepage. A good reference for all battery charging and connection questions. When you connect them like this, they operating in parallel - same as if you had wired the batteries in parallel yourself. Each battery will receive the same charging voltage. For some batteries, this this will be the correct charging voltage, However, the other batteries could be over-charged or under-charged. All the Battery Tender sees is one battery!This is answered on the Battery Tender website. The explanations are excellent, with clear diagrams. Find this info in the education section - it's a on pull-down tab, at the top of the homepage. A good reference for all battery... » Read More When you connect them like this, they operating in parallel - same as if you had wired the batteries in parallel yourself. Each battery will receive the same charging voltage. For some batteries, this this will be the correct charging voltage, However, the other batteries could be over-charged or under-charged. All the Battery Tender sees is one battery!This is answered on the Battery Tender website. The explanations are excellent, with clear diagrams. Find this info in the education section - it's a on pull-down tab, at the top of the homepage. A good reference for all battery charging and connection questions. « Show Less
2260999
I have 2 of these & have never had a problem charging either ones batteries.
785657
After main battery reaches 13.1 volts it transfers isolation to other battery. Thus charging the second battery.