Only sometimes, as batteries are brand- and platform-specific, but some adapters allow cross-brand use. Always check compatibility before using.

Higher Ah batteries provide longer runtime but are heavier. Lower Ah batteries are lighter but need more frequent charging.

Yes—lithium-ion batteries are lighter, hold a charge longer, and offer better overall performance compared to older NiCad options.

Yes, it is a good idea. Having spare batteries keeps your workflow moving without waiting for recharges, especially for all-day projects or heavy-duty jobs.