I bought a Acer BTP-43D1 battery , Should I upgrade or buy a new battery?

Question:I do like Acer BTP-43D1 battery , it still above average to everyone else’s except battery time. I know this is an issue for a lot of people. I have a day where I have 3 class’s. I keep having to sit next to the plugs to keep energy up for another class, Should I buy a new battery and charge both each time? Answer:You can buy a battery( Dell 75UYF battery , Dell 3149C battery , Dell Latitude CPi battery , Dell Inspiron 1000 battery , Dell Inspiron 1300 battery ,sony PCGA-BP2NX battery , sony PCGA-BP2SA battery , sony PCGA-BP2S battery ) that is a little bigger and has larger charge time. That’s what I did. Now I have two batteries, one lasts longer.