Dear Lifehacker, After a full day of use on my Android smartphone, I am often left with very little battery but still have important messages to relay to family and friends. What is the most battery-efficient way to get them across before my phone goes dead? Calling, texting or WhatsApp? Thanks, Battery Burner
Picture: Joris Louwes
Once your battery is going, it's going, and the bad news is that none of the cases you've outlined are massive power hogs in any real way. Of the three, WhatsApp has been noted as being a data heavy app in research undertaken by Alcatel-Lucent, and anything that's chewing serious data is also likely to be chewing battery along the way.
If you look at how Android manufacturers such as Sony and Samsung implement their severe battery saving measures, they almost always boil down to calls and texts only. If you've got one of those models — Sony refers to it as Stamina mode, while on Samsung phones it's Ultra Power Saving mode — then by all means use it.
Of those two modes, short texts that involve small bursts of data are likely to be less power intensive, although depending on how low your phone is getting in real power terms the differences might not be perceptible.
What could make more sense is to carry a backup battery or external battery pack, or charger if you can manage it. Failing all else, our guide to maximising your Android battery life should give you a few tips to extend the overall battery life of your Android smartphone.
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