3

Battery life is measured in number of charge-discharge cycles. Charge Cycle wiki says

Apple Inc. clarifies that a charge cycle means using all the battery's capacity, but not necessarily by full charge and discharge; e.g., using half the charge of a fully charged battery, charging it, and then using the same amount of charge again count as a single charge cycle"

This definition seems to be Apple oriented. My question is

Does Android follow the same definition or is there a different definition ?

Asking since I have both an iPad and Android (Samsung Galaxy) and was wondering if battery life is measured similarly or differently.

  • Plenty of references in our charging tag-wiki (especially check the "Handling" and "Maintenance" sections there). – Izzy Feb 29 '16 at 7:05
1

AFAIK I know there isn't any Android specific definition (would welcome corrections from others). Having said that, industry seems to treat this metric differently.

Wikipedia definition implies 100% discharge to count as one cycle, where as industry seems to treat 80% discharge to count as one cycle per sources below

Cycle Life:  The capacity of a rechargeable cell or battery changes over its life. The definition of the battery life or cycle life of a battery is number of cycles that a cell or battery can be charged and discharged under specific conditions, before the available capacity falls to a specific performance criteria - normally 80% of the rated capacity

A discharge/charge cycle is commonly understood as the full discharge of a charged battery with subsequent recharge, but this is not always the case. Batteries are seldom fully discharged, and manufacturers often use the 80 percent depth-of-discharge (DoD) formula to rate a battery. This means that only 80 percent of the available energy is delivered and 20 percent remains in reserve. Cycling a battery at less than full discharge increases service life, and manufacturers argue that this is closer to a field representation than a full cycle because batteries are commonly recharged with some spare capacity left.

There is no standard definition as to what constitutes a discharge cycle (....)

To summarise, Wikipedia definition seems academic while industry treats it practically

(Aside, Charge Cycle Counter, which measures battery charge cycles follows Wikipedia definition )

Why I presume Android follows industry definition

Apart from the two reasons mentioned above for 80% discharge to be measured as one cycle (namely, real life charging and better battery life ), I suspect that battery manufactures would prefer this as it boosts battery life cycle count by 20% compared to Apple/Wikipedia definition.

  • Glad it helped :) – beeshyams Mar 1 '16 at 6:45

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.