Let's be blunt: the Pre's battery life leaves a lot to be desired. My Centro could go ~2 days between charges. My Pre is often nagging me before I go to bed each night.
Some observations about what helps & harms battery life, based on my own usage: 1) The biggest drain is weak cell signal. If you have 1 or 2 bars of coverage, your battery life will suffer hugely. If you're roaming and have low signal, turn off data roaming (in Phone prefs) to save a TON of battery. 2) Wi-Fi is a drain. Turn it off except when you need it. 3) Screen brightness has some impact, although it pales in comparison to 1 & 2 above. 4) Using data-intensive apps will burn up your battery faster than those that use local data only. If you're desperate, turn off auto-fetching of email (manual only). 5) The Pre charges quickly (a small bucket to fill, I guess) so even 10 minutes on the charger can significantly extend your battery life. -- CRA1G on Twitter
