I have a Droid Razr HD which, in it’s day, was renowned as having one of the longest-lasting batteries. That allows me to charge nightly, though occasionally I can skip a day, and some days of heavy use drain the battery in a couple of hours and require mid-day chargings.
You claim you use your phone a bit for private use, but the fact that you even can last more than 3 days on a charge tells me that it isn’t a smartphone, and Mrs. Squeeky’s isn’t either. Am I correct that you are using “dumbphones”?
@Dutchess_III There is a grain of truth to that, but Lithium Ion batteries don’t have the sort of memory effect that NiCad batteries, the technology of choice for rechargeable batteries a decade ago and still occasionally used in cheap electronics, do. About the only NiCads I see any more are in old cordless landline phones and low-end radio-control vehicles; the hobby-grade R/C rigs and cordless powertools moved to NiMH and/or Lithium yeeeeears ago.
In average use, a Lithium or NiMH battery degrades more by being exposed to oxygen or high temperatures than through charging regimen. However, NiCads are pretty fussy about being discharged before recharging, and since NiCads were the rechargeable batter for a couple of decades, I can see how one may thing that all rechargeable batteries are like that. And honestly, treating a Lithium battery with the same charge/discharge regimen as you would a NiCad is harmless and actually does have a slight benefit, but it’s not essential like it is with NiCads.
@LuckyGuy I use mine as a dash-mounted GPS, and during warm weather, that little area above my dashboard pushes the temperature of my phones battery up to ~120F. Given how LiOn batteries are affected by temperatures like that, I don’t think that waiting for it to hit 1% charge between chargings would be enough to counter the abuse I heap on my phone. How the heck it’s battery life has barely reduced in the last 3 years is beyond me, but implies that LiOn batteries are getting more stable as they evolve.