OH wow, only a 200mah charger?? That will take quite some time to charge.. As far as battery life goes.. I used to carry 3-4 808D-1 batts with me everywhere I went and had to charge about every other day. I recently got an eGo and the difference really is night and day. I am finally able to leave with one PV in my pocket and not worry whether or not it's going to die. I've used the same batt for 3 days now and finally decided I should give it a charge. lol Nice to know I have something I can rely on as I'm sure you will feel the same. My batts are the regular 650mah so at 900, you should expect a great deal of use before hitting the charger. I would say with that low powered charger your best bet will be to throw it on when you go to bed and let it charge overnight. Hopefully it will be ready when you wake up.