---
title: Powerocks Stone 3 (7800mAh Dual USB Power Bank)
date: 2013-07-17 09:02:27
permalink: https://lesterchan.net/blog/2013/07/17/powerocks-stone-3-7800mah-dual-usb-power-bank/
author: Lester Chan
categories:
  - "Battery & Power"
tags:
  - "3"
  - 7800mAh
  - battery
  - power bank
  - Powerocks
  - stone
---

Got the [Powerocks Stone 3](http://www.powerocks.com/a/p/4/2011/0922/27.html) which is a 7800mAh Dual USB Power Bank from my cousin in Hong Kong. I am not too sure of the local retail price, but on [Amazon](http://www.amazon.com/Powerocks-Universal-7800mAh-Extended-Battery/dp/B008L4A75U), it is retailing for **US$48.50 (S$62.50)**.

As the name “stone” implies, this power bank is pretty heavy (like a stone) due to the 7800mAh battery and it weighs 500g.

The build is also solid (like a stone), there are practically no openings. It felt like a solid block of plastic. It measures 7.5cm x 7.5cm x 2.7cm.

There are two input ports for charging this power bank, Micro USB Port and Mini USB Port. The charging time varies: more than 8 hours (computer USB port = 500mA), about 7 hours (USB charger = 1A), about 5 hours (quick USB charger = 2A).

There are two output ports as well, and each of this port can output a maximum of 2.1A, which is enough to charge an iPad.

The light on the individual alphabet on the logo “P-O-W-E-R-O-C-K-S” determine how much power is left in the power bank. I think the indicator is pretty nicely put, though I have to figure this out from the user manual.

- P = 11% – 22%
- PO = 23% – 33%
- POW = 34% – 44%
- POWE = 45% – 55%
- POWER = 56% – 66%
- POWERO = 67% – 77%
- POWEROC = 78% – 88%
- POWEROCK = 89% – 99%
- POWEROCKS = 100%

![Powerocks Stone 3 - Box Front](https://farm8.staticflickr.com/7334/9248876684_7822d1e608_c.jpg)

![Powerocks Stone 3 - Box Back](https://farm8.staticflickr.com/7295/9248875900_757811efaa_c.jpg)

![Powerocks Stone 3 - Box Contents](https://farm3.staticflickr.com/2857/9248873590_0cb900695c_c.jpg)

![Powerocks Stone 3 - Front View](https://farm6.staticflickr.com/5486/9246090033_91894c2b4b_c.jpg)

![Powerocks Stone 3 - Back View](https://farm3.staticflickr.com/2857/9246089017_289b8132c1_c.jpg)

![Powerocks Stone 3 - Side View](https://farm4.staticflickr.com/3769/9246086823_b43b3d71e1_c.jpg)

![Powerocks Stone 3 - Ports](https://farm3.staticflickr.com/2881/9248870348_7c1a8c6028_c.jpg)

![Powerocks Stone 3 - Glowing Logo](https://farm3.staticflickr.com/2863/9248868890_52345e99b4_c.jpg)