An inefficient tool (generally tools of lower quality) will waste excessive power simply transferring energy to the business end of the tool, which will severely decrease the runtime of a battery. Some new batteries (or batteries that haven’t been used for a while) may take between 5. The Bosch BAT622 battery is the lightest, most compact and longest runtime Fat Pack-style battery available in the power tool industry. CoolPack heat-conductive housing is specifically designed to cool internal cell temperatures for 100% longer recharge life.
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