| Rechargeable batteries | Rechargeable batteries come in three varieties of chemical compositions. NiMH (Nickel Metal Hydride), NiCad (Nickel Cadmium) and LiIon (various Lithium Ion technologies. The newest, lightest and longest lasting are made with Lithium. Some power tool manufacturers have made their new Lithium Ion Battery power tools backwards compatible with their older products and with others, you need to use the technology that matches what you have. If you are not sure which battery to purchase, check the manufacturers website.
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