This product charges a range of Blackberry devices from the mains, though not all: few types have a different geometry for the cable-end which fits the phone, so check before buying that your phone type is listed.
Basically it's simple, functional and good value for a Blackberry accessory. It's supplied with different mains plug adaptors: the 2-round pin type for most of the EU, the 3-square-pin type for the UK, Ireland and a few other places (like Hong Kong, Saudi Arabia and the UAE), and the 2-flat-pin type for the 110V mains in the USA and Canada.
As new Blackberries are supplied with one of these in the box, you're only likely to need one if yours breaks, gets lost or if you need a spare. The Amazon price is about 25% of the recent high-street retail price commonly charged in mobile phone shops, so you really can't go wrong.
An excellent additional accessory for this charger is the charging pod, which keeps the Blackberry in an upright position with the clock-face visible whilst charging. Check it out.