Tools
You can get by with cheap tools when you are needing them for an emergency, and you do not have any tools available nearby. However, if you decide to buy tools for your use, you will want a piece of equipment that would stay strong for years, which is why spending a bit more money on tools is not a bad idea.
Batteries
Dollar store batteries are usually made poorly and quickly runs out of energy. A lot of them do not use modern formulations, making them susceptible to leaking. When talking about batteries, it is far safer to purchase branded ones so that you can be confident regarding its quality.