[pyro254750]

Hard to say how much extra life the ext life batt will give you. Everybody uses different applications, and has varying amounts of usage on their phones, so even someone who owns a TP with both batt's cannot give you an answer to your question. here is what you need to know. you have a 1200 mAh battery. mAh stands for milliampere-hour, which means that in one hour, your battery will supply 1200 milli-amps. The same applies to the 1800 mAh battery. Now my electrical theory is a bit rusty, but, unless im mistaken, that means that if your phone draws 200 milli-amps per hour, the 1200 mAh battery will last for 6 hours, whereas the 1800 mAh battery will last for 9. You do the math, the battery has 50% more juice in it. Personally ive found that the best way to optimize battery life is to optimize the phone. flashing to a better rom, tweaking, trying out different radios to see what works for you, and even the type of charger you use, all effect the battery life.

Something ive found through using different chargers, is that a stronger charger will yeild better battery life than a weaker one.