I'm trying to understand how the batteries operate.. does it operate on one battery at a time ? Is there a switch to go from one to another? Would you swap the sides they are on?Would you change them both at the same time? I'm trying to understand how the batteries operate.. does it operate on one battery at a time ? Is there a switch to go from one to another? Would you swap the sides they are on?Would you... » Read More I'm trying to understand how the batteries operate.. does it operate on one battery at a time ? Is there a switch to go from one to another? Would you swap the sides they are on?Would you change them both at the same time? « Show Less
1070110
In can use 1 or 2 batterys. There is no switches or anything. If you put in 2 batterys is just will drain one the start on the next.That will give you much longer shooting. On the D3100 you can take 550 shot on one battery. With two you get 2x550. That is the purpose of this grip. It also make shooting in portrait much better. I hope this helped.
1070111
Once is run out of charge you can change one, but that would beat the purpose off the professional Vertical battery holder. I suggest you buy additional batteries, and keep them charged, if you don't use an external flash and the batteries are sound and good conditions, they should last about six days to a week. But if you are like me, I forget to turn off the camera at times they may last less time. Is a good product and very reliable, I hope you will enjoy it as I have.
1070112
You can put 2 batteries on the grip but The grip use one battery at the time and when this battery is power empty the grip uses the other battery. The grip has no switch. The grip is functional with 1 battery if you want. I have big hands and the grip is perfect to have my camera in my hands, ita feel better holding the camera with the grip on. You need a charger for each battery if you want to charge the 2 batteries at the same time. I charge one first and then the other because i have just one charger.
893688
I don't understand how you can change batteries twice but don't know where the battery compartment cover is. Anyway, on the pink plastic on the back (visible in the picture) there is a circular button to press that activated the light. Additionally, on the lid to unscrew to insert battery on the uniorn's tummy youlwill see a switch. Push to the left so it lights for 20 minutes and cut off after.
648172
You can charge two batteries at one time. The picture is very misleading. The picture appears that the four batteries are actually connected to the charger but what you are seeing in the picture are the four batteries touching the side of the battery charger.
900111
This guy has an on/off switch so you can turn it off when not in use. I have taken several time lapses of 300+ pics and I al still using Google the original batteries. Two things to consider: 1. These are stick batteries, so it's easier to carry additional batteries with you. 2. The draw back of on/off switch is that you have to reset all your parameters every time you turn your timer on as the settings are wiped out every time you turn it off. I hope this answer red your question.
1633299
Sorry for the lateness of the reply.,But in answer to your question... Yes you can use two batteries at the same time...Hope this helps good luck...
503925
I have not timed it, but I have not had my battery run out on me yet. Unless you have a great price on a second battery, why not give it a try with just the one and see if you in fact do not need the second.
164166
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.
1037713
Well, my experience is that each slot operates on it's own. Given slots 1, 2, 3, and 4. I insert a battery in slot 1, accept "Charge" as the mode, go to 800 mamp, accept that, and put a battery in slot 2. Slot 2 then lets you select the charging mode (charge, break-in, refresh, discharge) but slot 1 setting should not be affected. I just tried it with 3 batteries and experienced no problems. One thing to consider is this. By accepting, you press "Enter". For charging, you press "Enter" for charging, then set the charge rate with the up and down arrows. Then, you have to press "Enter" again for the charging rate. It may look like you had chosen the charging rate by pressing the up and down arrows, but to complete the setting, you have to press "Enter" again. I don't know if that's your issue, but that's my best guess.
2259694
these things are a litte quirky, sometimes I hit the buttons to change from 3 amp to 12 amp and it resets it when it's stuck. Also- if you have time- let it's do it's magic- I think it's conditioning the batteries by taking forever sometimes- end result- it can make old batteries take full charge and extend their life, sometimes mine will take 12 hours to get full charge. If you have the time- I suggest letting it's do it's thing. I call it the jedi mind master charger- who knows how it works- but it works
900112
This guy has an on/off switch so you can turn it off when not in use. I have taken several time lapses of 300+ pics and I al still using Google the original batteries. Two things to consider:1. These are stick batteries, so it's easier to carry additional batteries with you. 2. The draw back of on/off switch is that you have to reset all your parameters every time you turn your timer on as the settings are wiped out every time you turn it off. I hope this answer red your question.
2024959
There's a tiny, hard to see diagram if you look close at the sides while the batteries are removed. There's also a large, easy to read one on the back of the package the flashlight comes with.In short, the two stacked batteries on the left side face up (+), while the two stacked on the right face down (-). If it doesn't work, swap right/left. Two attempts and you'll get it.
451160
Well let see.... I don't remember every changing the batteries since I put them in place, so if you can see when I bought them, not since then. Thanks for reminding to change the batteries. I do test then so I know they still work. One has saved me a couple times.
1084321
They provide four batteries with the two units. Batteries are on all of the time so they run down in a short period of time. My unit never worked right from the start. Save your money on this one,
2202953
No you will have to purchase one other battery to go with the one battery for it to operate
1544689
I dont think so but why would you wanna do that and waste more time? Just switch batteries and problem solved :)
199744
yes .there is a switch for the different types of batteries.I hope this help.
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