Kobalt K20LD-26A Manual page 91

OPERATING INSTRUCTIONS
Battery packs are shipped in a low charge condition to prevent
possible problems.
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Lithium-Ion Batteries
It is not necessary to run down the Lithium-Ion battery pack charge
before recharging. Remove the battery pack from the tool and
recharge it when it is convenient.
NiCd Batteries
For best performance, fully charge and fully discharge the battery for
each cycle.
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A fully discharged battery pack will charge about 20-60 minutes,
depending on the type.
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