I think I actually like having an extra battery / charger more than having the larger battery.
I have a desktop charger that the battery just goes into to charge - the phone can sit in it as well (not charge, though). Since I purchased that, I haven't plugged in my S3 to charge a single time.
The Maxx HD is awesome, and the battery life is awesome. But I found myself having it plugged into a charger almost as much as my S3 (pre extra battery). Why? The biggest reason is it takes forever to charge. If I let it get below 40-50%, we're talking a couple of hours to get it back to 100%, easy. If it's not nighttime (which I normally like to have my phone next to my bed where I don't charge it), it's hard to leave it plugged in for that long without needing / wanting it for something. So that actually makes me worry about plugging it in more often, ironically (yes, I'm odd I guess). So if I ever got it up to 100%, yeah it would do me good for awhile, but I wasn't comfortable letting it get much lower than 40-50% or so b/c of the length of time to charge it.
With the two battery / charger "system", when I get low, it takes all of 1 minute to swap 'em out and I'm back up and running again at a full charge and never have to plug my phone in.
Everybody's different, of course... but for how I work / live, I've found having the extra battery with the ability to charge it by itself much more convenient.
I have a desktop charger that the battery just goes into to charge - the phone can sit in it as well (not charge, though). Since I purchased that, I haven't plugged in my S3 to charge a single time.
The Maxx HD is awesome, and the battery life is awesome. But I found myself having it plugged into a charger almost as much as my S3 (pre extra battery). Why? The biggest reason is it takes forever to charge. If I let it get below 40-50%, we're talking a couple of hours to get it back to 100%, easy. If it's not nighttime (which I normally like to have my phone next to my bed where I don't charge it), it's hard to leave it plugged in for that long without needing / wanting it for something. So that actually makes me worry about plugging it in more often, ironically (yes, I'm odd I guess). So if I ever got it up to 100%, yeah it would do me good for awhile, but I wasn't comfortable letting it get much lower than 40-50% or so b/c of the length of time to charge it.
With the two battery / charger "system", when I get low, it takes all of 1 minute to swap 'em out and I'm back up and running again at a full charge and never have to plug my phone in.
Everybody's different, of course... but for how I work / live, I've found having the extra battery with the ability to charge it by itself much more convenient.