£9.99 for a 20000mah power bank! For a tenner you are likely to only get a 10,000mah bank elsewhere (in the UK). Could be a misprice by Amazon as camelcamelcamel is showing £14.99 and hotukdeals picking the title at £14.99 - I have checked out and paid £9.99 :)
These have a fairly good rep on here and in reviews of their other items.
Go easy first ever deal posted :) Hope this helps others.
Battery: Li-Polymer battery, 500+ recharge cycles
Input: 5V / 2A (Max)
Total Output: 5V / 3.5A (Max) OR 2.4A max for single port
Dimension: 6.22 × 2.71 × 0.74 (inches) / 15.8 x 6.88 x 1.88 (centimeters) - 340g battery weight, 422g boxed weight
Fully charge time: Approximately 11 hours @ 2.0A charging.
1 x Swees 20000mAh Portable Charger
1 x Micro USB cable
1 x User Manual