Well, its one way of making sure that you always have a spare charger in the office. Just buy one of these and you are set for life ; until of course they do manage to make those wireless charging technologies feasible.

USB Multi-Cellular Phone Charger can charge the most common cellular phones in the market - Motorola, Sony Ericsson and Nokia etc. Convenience to travel.

Features:
# Charger your mobile phone by USB
# 8 different connectors - Motorola I, Nokia I (3.5mm), Samsung, Motorola II/Mini USB (for Motorola/HTC/Dopod/MP3/MP4) , Nokia II (2mm), Sony Ericsson II, Siemens, Sony Ericsson I, Mini USB in
# Output: 5.5V CD, 200mA max
# Dimension: 50 x 30 x 24.5mm (approx.)
# Weight: 21g

Package Contents:
# USB Mobile Phone Charger
# USB Retractable Cable
# Carrying Foam Rubber
# Travel Bag
# Users Manual

Costs USD $18 and sounds like its totally worth it.