Hey Guys - just thought id get some advice on what brand intervelometers you guys have used before or use now.. i want to try some time lapses with my Canon 550D and obviously need to buy an intervelometer to organise the shots.. another question as well- i have a big enough SD card, but what about the battery? Will it survive for 9 hours if I'm taking a shot per minute?

Thanks in advance guys

Imogen