I have a question about these batteries. I'm a bit new with these types of batteries so bear with me here. Anyway, I seem to be needing to recharge my battery about 2 times a day lately with the standard 2600 mah battery that comes with the eVic. I do kinda chain vape, I get about 800 puffs per day on this thing, but it seems a little low with this battery. Is it time to replace the battery, or do I just need to upgrade to the 3400 mah battery? I honestly have no clue how to know when to throw these batteries away, and I don't have a multimeter to test the charge on them. Anyone mind to lend a hand?