Can it charge three batteries ?
581973
No Joan, it can only charge 4 or 2 batteries at a time. I tried three and the "green light" never flash to indicate that it was charging; plus there is no 3 battery selection at the top - just 2 and 4 batteries. But this is an awesome product, great price and you get a car charger for those long trips for your kids hand-held games; keeps them happy and preoccupied while you drive. It also charges other rechargeable battery brands (Energizer and Duracel)
581974
Joan - I think it will only charge 2 batteries or 4 batteries by design - Harold
1155922
I don't know. I have used it to charge iPhones 3GS, 4s, and 5. It gives each of them one full charge.
1516633
It can charge up to 4 batteries, so far we have used it on both C & D batteries, on alkaline as well as rechargeables.
582694
For a professional answer you will need to email ProMariner. But as far as I know the 20amp is only rated for three batteries at a time. But it would eventually charge the six batteries but it would be a slow process. I use the 20amp to charge two 100amp batteries on a Track Chair and it is fast.
1712177
Yes. You can charge 2 USB devices and 3 electrical devices at the same time.
1427987
It can charge up to 4 batteries at a rate of 6 amps each. A 20 amp could do the job if you are not charging 4 packs at full capacity at once. A 30 amp power supply is a safe place if you are going to charge multiple batteries at once. Here's a good 20 AMP supply. Racer's Edge 20 Amp, 13.5V DC Dual Output RC Power Supply with USB
1964571
The charger is designed to charge both aa and aaa batteries, in multiples of two. I don't know for sure if you can comingle aa and aaa batteries for charging at the same time.
496392
Each battery takes an extension but yes it is suitable - you will just need 3 if you are trying to extend all 3 batteries on a 3 bank charger.
289839
It will charge 8 batteries at once, but they must be charged in pairs. So you could charge 4 AA's and 4 AAA's at once.
267706
I use it to charge 3. Cannot recommend. Does't hold charge very long. Buy different one.
1186912
The equipment I use the batteries in uses 3 batteries so I only charge 3 and it works fine. I have not tried it but if it lights up at the top of the battery with only one then it is charging the one. The light will move from bottom to top when it is charging.
1763903
It could be... I am using this charger for couple of months, charging 3 types of batteries, so far no problems...
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.
340532
Yes you could use it to charge batteries, though I would look for something cheaper that provides less power. This device supplies way more than you need.
1188620
Yes! it works great, it also will let you know if the battery needs replacing, it also charges the batteries pretty fast.
2083567
Yes, three separate batteries can be charged at one time. Unit work great..
879448
I've used it fo 2 31series batteries I think it would depend on the size and condition. It would probably maintain them but I dont think it would adiqilutly charge 4 batteries unless they were small