Top positive review
61 people found this helpful
Works well with my Nexus S batteries
on October 11, 2011
Here are the missing instructions: Try terminals on your battery until you get a red light. Then plug it in and wait until the light turns blue. It automatically figures out which is positive and negative for you.
I bought this charger because I got a few batteries for my Nexus S for cheap and didn't want to have to swap them out of the phone to charge them. I've actually been pretty impressed with this device. It says on the back of it that it can tell which terminals are positive and negative automatically. I was pretty skeptical of this claim until I checked it with my multimeter, and sure enough, the thing automatically figures it out when I put the battery in backwards. After I figured out that the light hints to you how to use it, I thought that the entire thing was really clever.
It also charges my batteries fairly fast, so it's probably equally clever about how to charge lithium-ion batteries. All in all, pretty happy with it.