
Предыстория
Думаю, многим знакома такая проблема: пользуешься смартфоном весь день, а вечером смотришь на оставшийся заряд – а там 25-40%. И вроде как ещё прилично осталось, не хочется заряжать, при экономном использовании должно хватить, но прекрасно понимаешь, что из-за какого-нибудь достопочтенного господина или госпожи (из-за себя самого в конце концов) придётся, скажем, раздавать Wi-Fi три часа, держать долго включенным экран на максимальной яркости… Да даже музыку послушать через Bluetooth порой стрёмно, как бы не остаться без связи с севшей батарейкой... А аккумулятор то не резиновый! И тут приходит в голову мысль о том, что можно носить с собой насадку на насадку… Извините, не тот сценарий… Кхм-кхм! Аккумулятор для аккумулятора, проще говоря Power Bank.
Power Bank Defender ExtraLife 4000 mA*h

Покупал такую ёмкость, потому что дёшево (всего 400 рублей), а у моего смартфона был аккумулятор на 2500 mA*h. Фактической ёмкости хватало чуть меньше чем на 1,4 заряда смартфона, чего мне хватало с головой. 2500*1,4 = 3500, что близко к правде. Можно было бы взять аж 40000 mA*h, но, во-первых, фактически там было бы чуть больше 30000, во-вторых, такой аппарат был бы дорогим, а в-третьих – тяжёлым.
В комплекте с собственно внешним аккумулятором идёт маленький кабель USB 2.0 – MicroUSB длиной примерно 0,2 метра. Компактный, удобный, да и в принципе лишним не будет. Чем таскать полутораметровый провод, не лучше ли использовать коротенький шнур?

Корпус металлический, приятный на ощупь, но особой тяжести не добавляет. Power Bank лёгкий, и достаточно компактный. Он узкий, что позволяет спокойно носить его в кармане джинсов:

У Defender ExtraLife один вход – MicroUSB и один выход – USB 2.0. Есть индикатор заряда, выполнен в виде четырёх синих светодиодов. Кнопка включения позволяет в любой момент включить индикатор, чтобы узнать, сколько осталось заряда.

Сзади можно увидеть характеристики устройства: Входной ток – 1.5 А, выходной – 2.1 А.

Этот Power Bank станет отличным выбором для обладателей смартфонов с маленькой ёмкостью батареи. Его можно брать в институт или на работу, на случай, если с предыдущего дня осталось заряда 20-40%. Зарядив смартфон вы также сможете в случае чего потратить оставшийся заряд на зарядку аксессуаров - например беспроводных наушников:

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