Apparently my Symbian phones didn't any issue lasting a couple of days.
C++, Java, Python, Camera, video, a multitasking OS, Internet access, lasting two/three days on single charge.
Yet my first Android device, running Froyo, could hardly last a full day, in spite of forked Java that was supposed to perform better than what Nokia and Sony were delivering.
I always had to carry spare batteries for my Symbian devices, no way did they last a couple of days under regular use. Same with my Sony Ericsson J2ME phones. Running stuff like IRC, streaming radio, bluetooth headphones, really sucked down the battery.
My very last one, Nokia 6120 classic did last a couple of days.
> The battery life of Nokia 6120 is impressive. To give you an example, a daily average of 5 minutes of calls and 20 SMS requires charging every four to five days. More demanding jobs, including active internet browsing in UMTS, will surely reduce durability to 2-3 days, but even so the phone does great. Charging takes about 2.5 hours.
> a daily average of 5 minutes of calls and 20 SMS requires charging every four to five days
I literally laughed out loud at that.
Modern smartphones have fantastic battery life if you switch off data and use them like dumbphones. When I travel sometimes I leave my home SIM with data off in an old iPhone and it easily lasts a week.
In fairness, my Samsung S7 will happily last 2-3 days on a charge if I put it in "ultra power saving mode" (and this is a 3 year old device). And this still allows me to make calls/texts, use WhatsApp, the camera, and browse the internet. The Nokia 6120 presumably couldn't ever do much more than that.