How To Maximize The Battery Life Of Your Lithium-Ion Cordless Drill
Because of increased performance over their NICAD and NIMH counterparts, Lithium-Ion batteries are becoming more and more prevalent in cordless power tool offerings. The technology and underlying chemistry of Lithium-Ion cells is being improved continuously and further advances in energy output and Lithium-Ion cell life will be evident in the years to come. However, the purchase you make of a Lithium-Ion power tool represents and investment in both your time and money and you need to know how to best care for these batteries, and maximize your investment.
Proper Discharge
Most Lithium-Ion drill batteries provide up to 2000 discharge/charge cycles. Care should be exercised to avoid a full discharge. Best practices suggest using the battery until power loss is noticed, then place battery on charger to recycle. The memory effect, common with NICAD and NIMH cells, is not a concern with Lithium-Ion batteries. Since most drills come with two batteries, just switch out to your spare battery while recharging your primary.
Lithium-Ion Battery Age
Aging of lithium-ion batteries is an issue affecting battery performance which is often overlooked. Most common lithium-ion batteries, with normal use, last between 2-3 years. The onset of aging increases oxidation and internal resistance. This results in a loss of capacity even though the cell may show an ample charge. Both temperature and charge level can hasten this affect.
Battery Temperature
As mentioned above the effect of temperature can have a negative impact on a Lithium-Ion batteries capacity and life-span. If you notice your battery pack getting hot to the touch after a period of use, it is advisable to remove the battery and place it in a cool area until the heat level is reduced.
Battery Storage
Do not store your batteries by keeping them continuously plugged into your charger. Long term storage at a continuous full charge will reduce the life of your batteries. However, many modern Lithium-Ion smart chargers have circuitry to prevent this problem. Most experts agree, unless otherwise advised by the batteries manufacturer, you should store your batteries in a cool, dry area at a 40% charge. Always avoid freezing temperatures.
Smart Chargers
Due to microprocessor technology, many of the battery chargers available for use with you Lithium-Ion drills are capable of addressing the issues mentioned above an can actually help improve the lifespan and performance of the batteries.
Conclusion
A Lithium-Ion powered tool is no different, in some respects, to the human body. With proper care and use, your Lithium-Ion batteries should give you many years of use.
One final note should be heeded. This information is not meant to replace the advice from your drills manufacturer. Always read you owners manuals included with your Lithium-Ion drill. Your drill manufacturer knows better than anyone how to properly use and care for your equipment.
