Reply to post: Lots of ways to charge a phone

Most of the world still dependent on cash

Richard 12 Silver badge

Lots of ways to charge a phone

Petrol generators are common.

Solar power is often feasible - and provided by charitable donation to boot.

Human power for a mobile phone is also quite common.

A 3000mAh phone battery is about 40kJ, or 10 food calories.

10% of a twinkie.

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