I'm sorry to ask, this is probably a dumb question. I tried looking around, but I didn't have any luck. Are there any threads or links of FAQ's for specific PV's? I just bought a Joye 510-T and I have so many questions...... How long do the attys work before I need to replace them, how do I clean them, how many times can I fill the "tank" before they need to be replaced, what's the average lifespan of a battery, are all the Joye 510 PV parts interchangable, etc?