Powertraveller powerchimp lite emergency charger the powerchimp lite is a compact emergency charger giving you back up power for your 5v devices powered by 2x aa batteries included the powerchimp lite gives a 30 charge on iphone 4 blackberry and various other smartphones such as the samsung galaxy range works with the powerchimp lite has been primarily designed to give back up power to smartphones such as iphone blackberry samsung and htc ndash typically delivering an extra 30