Portable Mobile Phone Charger, uses 4 AAA batteries (LR03, AAA 1.5V)
Pack includes Samsung, Sony Ericsson, Mini & Micro USB, Nokia Small and Big connector.
It also includes non rechargeable 4xAAA batteries.
I have tested this on my three phones and it worked well.
1) Blackberry with Mini USB and it charges fine
2) ZTE Blade with Micro USB
3) Nokia 5230 with Small tip.
This is Instore ASDA in Travel Accessories section.