Montana 600 Battery Replacement Compatible for Garmin Montana 600, Montana 650,

I have played with lots of Lithium-Ion batteries in my day, and these look like they stored well. The Date stamp on the 5 packs I bought were 2014 in spite of the fact the seller indicated they were fresh from the factory via email exchange. They all charged up extremely well, and still had quarter charges on all of them when packaging was opened. I have done a charge and drain test and they are far better than the OEM original battery that came with my GPS. I am getting near 20+ hours of run time in my Garmin 650. The reason for buying 5 was I am going on a 8 day backpacking trip in the wilderness and didn't want to loose the track for the entire trip with no means to charge batteries.I am very happy with these batteries and can update this post after the trip! Not sure what the Warmth rating is for, but these batteries run with no temperature issues in my Garmin 650. Oh, one more thing. The batteries charge and work fine, but you don't get the lightening bolt on the battery indicator with these batteries installed while charging, if that matters to you. it didn't for me.

It works good

it worked,and i'm happy