Cordless Tool Batteries
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Common voltages are 12V and 18V. Typically higher voltage means a more powerful tool, but can often mean a heavier battery.
Nickel cadmium (NiCad) batteries are widely used and a proven, economical choice. Lithium ion (Li-Ion) batteries are newer tech with a higher energy density. This can mean a lighter weight plus no self-discharge and/or charge memory.
Refer to a battery’s amperage hours (Ah). A higher Ah means a longer time between charges.
Batteries that can utilize “smart” chargers can not only shorten charge time but can help extend a battery’s life.