How much life is left in my Xperia Z2?

[venom0706]

So, my Xperia Z2 is 1 year and 10 months old and has been charged almost every day since I started using it (almost never below 30% or above 90%). Since I've bought a new phone, I will leave my Z2 as a secondary one. My question is:

How much life do you think there is still left in the phone even for secondary usage? I only plan watching video clips on it from now on. Do you think the battery can last for at least 1 more year or the phone will simply die due to the life cycle of the battery being over? I hope the info above is sufficient for answering question.

Thank you.

 

[Rukbat]

My Samsung batteries - 3 years old - are still working. So is my Motorola V551 (12 years old) battery. 30% is a bit low - charge at 40%-50%. And you can leave the charger connected even long after the phone reaches 100% - the internal charging circuit in the phone turns the charge off when the battery doesn't need it. (See Battery University - How to Prolong Lithium-based Batteries. I don't know who invented the "don't charge the battery to 100%" nonsense. If the battery is good, that's as far as it will charge. If it's not [or the design of the phone is faulty - cough:::Note 7:::cough], it can take your leg off, but that's no reason to not fully charge it [which means 100% plus 30 minutes, because "100%" isn't really fully charged].)

 

[venom0706]

Thanks for the info!

What about my phone's life cycle? Based on the information I've given, how long do you think the phone has until it completely dies? I am not talking about the battery holding less and less charge, I am talking about the phone completely dying without being able to switch on.

Thank you.