Lead Acid Batteries

Pros: These are generally the least expensive option to buy, and there are many options and suppliers to choose from. They offer the longest run time by size – five years or more – if sufficiently maintained.

Cons: Made up of over 60% water, they require regular monitoring to check water levels. The remaining make-up is sulfuric acid, so batteries must be handled with extreme care. Hydrogen gas may escape while charging, so batteries must be stored away from sources of fire or flame. They cannot be left to freeze.

AGM Batteries

Pros: Absorbent Glass Mat (AGM) batteries are maintenance-free, and there are many options and suppliers available. Gas evaporation is not an issue like with lead-acid batteries.

Cons: These batteries are approximately 30% more expensive than the lead-acid variety and larger for the same voltage. They must be stored fully charged after each use and cannot be left to freeze.

Gel Batteries

Pros: Gel batteries are quicker to charge and last longer compared to lead-acid and AGM batteries. They are maintenance-free and can freeze without losing run time.

Cons: These batteries are more expensive than the previous options and 40% bigger for the same run time compared with lead-acid batteries.

Lithium Batteries

Pros: Lithium batters are the quickest to charge, are maintenance-free, and have a ten-year life span. They are lighter in weight for similar run times compared to the previous options.

Cons: This is the most expensive battery option. If broken open, it may catch fire if exposed to air.