I've been using the Seidio 1750mAh slim battery in my HTC EVO 4G for almost 3 weeks now and although I don't believe that li-ion batteries need to be primed/conditioned to perform like they're supposed to, my EVO is definitely lasting much longer now than it did just a week ago.
I hadn't been seeing any noticeable difference between the performance of the EVO's stock 1500mAh battery and the Seidio 1750mAh battery, so the eye-opening findings at BatteryBoss about fake capacity claims were beginning to weigh heavily on my mind.
But then all of a sudden this week, I began to see a remarkable increase in battery life. As you can see in the battery usage chart on the right (taken on Wednesday, 6/24), my EVO went from 100% to 9% in 75 hours. Just a few days before that, I used the phone much less but got only 60 hours out of it (check the usage chart here).
After my last charge of the EVO on Wednesday night, I left it at home (it's not my primary phone) yesterday and spent the whole day out. So it didn't get used at all. When I got home and checked the battery usage, I was stunned.
Just 15% battery drain after about 17.5 hours of standby time with WiFi on!
Two weeks ago when my Seidio battery was only a few days old, I saw a 10% battery drain after just 8.5 hours of standby time also with WiFi on (check the usage chart here).
While it's clear from BatteryBoss's tests that many extended capacity batteries are indeed not living up to their claims, my Seidio 1750mAh battery is obviously one of the exceptions. I haven't changed a single setting or done anything differently since I started using the new battery, so it's really just getting better with age. I actually still don't believe that li-ions needs to be "broken in," even though these results are proving me wrong, so I'm just going to enjoy my increased battery life and not ask any questions about why it's happening.
Is anyone else experiencing similar results with their extended battery?
It seems to be a bit of a crap shoot, as some people have reported worse performance and overheating from these batteries, but if you want to test your luck: