[B2B_human]

Incredibly, my iPhone died while walking in NYC, but was still able to use the transit card at a gate. It goes into a low power mode that still has the payment/transit card powered.

[cameronh90]

Indeed. Android currently lacks that feature but without it I don't feel confident in going completely plastic free.

Perhaps at some point batteries will get so good that running out of battery just won't be a concern any more.