We haven’t even taken it outside, and we already love this battery

Copy link Copied Copy link Copied Subscribe to gift this article Gift 5 articles to anyone you choose each month when you subscribe. Already a subscriber? Login Your typical portable power bank, one small enough to slip easily into your handbag or briefcase, holds enough battery power to recharge your typical smartphone two or three times. The biggest power bank you’re typically allowed to carry onto a plane – one rated at 100 Watt-hours, the limit in many countries – can recharge that phone six times.

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