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Do bigger batteries mean longer run time or higher performance?

I recently bought an 18 volt cordless tool kit. It came with (2) 4 ah batteries. I want to buy two more batteries. I've found the 4 ah batteries to have very good run time and performance. They are fine with the circular saw, but they are pretty heavy on the drill and driver. I'm thinking about buying a couple of 2 ah batteries because they are smaller and cheaper. The batteries recharge quickly, and I'll alway have a spare if I buy two more. So, my question is will this affect performance or just run time?

3 Answers

Relevance
  • 3 years ago

    Run time.

  • SRΛSC
    Lv 7
    3 years ago

    Batteries don't correlate to performance. Just run time, in this case.

  • Anonymous
    3 years ago

    Mostly runtime, somewhat performance - deopends a lot on the specific battery type (Lithium are the least affected) and actual load (are we talking about a Bosch Ixo or a professional hammer drill?).

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