In my line of work, i meet several clients a day and a lot of times I am in their homes. I then will receive an email stating where I am to go to next and meet with cilents.. possibly at their workplace.
Some of the suggestions.. carry this around... plug into your laptop... don't actually work in professional worlds. I'm not at my friends house asking him if his mother will mind if i plug into her electrical outlets.
Lets say you're a real estate agent. You're showing houses all day long. You take photos to post to websites or email... You use GPS to get from location to location and quite possibly you may need to use your phone as a hotspot. You will destroy this battery.
I replaced my netbook with the evo.
So when I read some of the suggestions... I just keep in mind that we may be dealing with students, kids, or people who just use their phone socially. I've been self employed for almost 10 years and I love being able to be on the go and use technology.
It reminds me of bluetooth devices that stream music well... but die in 2 hours of use (Jabra Stone). Sure they're cool... but not practical.
I don't carry a backpack where i can toss in extra batteries, solar chargers and chargers.
I also realize everyone has a different version of moderate usage. 30 text messages and 10 phone calls is not moderate usage by any stretch. I send over 30 emails before breakfast (which is no different than what i've been doing since my Sprint blackberry 6510 in 2002).
You're making up barriers and excuses. If you're a real estate agent, you're in your car all day. Get a car charger for $10 and plug in your phone in between appointments, or while you're driving a client around. That's not difficult. If you're using GPS or the hot spot feature and NOT plugging in you're just expecting miracles. Be realistic: if you're using the hotspot, you have a laptop. I think you can make room in your laptop case for a 2 foot long micro USB cable. And unless you're using your GPS for a walking tour, you can plug in while using it.
Or buy 2 spare batteries for $10. That won't help in the middle of a 4 hour call, but you should be able to find 60 seconds once or twice a day to change a battery.
You say you don't carry a backpack, but be realistic. A spare battery will easily fit in a pocket, or the console of your car. And I don't believe any real estate salesman doesn't carry a briefcase or backpack of some sort. If you're tethering, you undoubtedly have a laptop bag of some sort, which will easily hold a couple of batteries.
If you replaced a netbook, then the Evo, two batteries, a micro USB cable and a car charger take up less space than that did, so get over it. If you really expected something with a battery 1/10th (or less) the size of the one in your netbook to last as long as the netbook did it's you who has the problem, not the phone.
edit, one more thought: Not only does the Evo have a much smaller battery, but I doubt your netbook served duty as a GPS and a phone, too.