Battery won't reach full charge(?)

[bmrdave]

I have 3 AW IMR 18490 1100mAh batteries in rotation, labeled 1, 2, and 3. Up until a week ago I had been charging them with a Trustfire TN270 and they always would charge to green. Two weeks ago I got an XTAR WP2II and started using it.
My problem is that battery 1 never gets to green when I put it in the charger. The other two batteries do. At first I thought it was a bad channel on the charger but when 2 and 3 are in they both get to green.
I check battery 1 with my meter and it reads 4.18v, which is what the other batteries read off the charger, and if I put battery 1 right back in, the channel stays green.
It only happens with this one battery, so is this a sign the battery is on its way out? It works fine and seems to last as long as the rest, but the XTAR software seems to find it fishy.
Any info would be appreciated.

 

[WillyB]

I'm a bit confused by your post.

Did you say that no matter which slot you put #1 in it never goes green?

 

[bmrdave]

I'm a bit confused by your post.

Did you say that no matter which slot you put #1 in it never goes green?

Yes. Left or right slot it's only Battery 1. The other two batteries, 2 and 3, will charge to green in both slots.

 

[WillyB]

Interesting.

it reads 4.18v, which is what the other batteries read off the charger, and if I put battery 1 right back in, the channel stays green.

That's pretty normal behavior, usually there is a threshold voltage that a battery needs to be at before charging will start, ie <~4.1V.

I really wouldn't worry about it.

I check battery 1 with my meter and it reads 4.18v, which is what the other batteries read off the charger...

... It works fine and seems to last as long as the rest

 

[bmrdave]

Thanks. I'll just keep an eye on it with the meter. It's good preventative maintenance anyway.