Currently, Amazon is selling the Makita BL1830 18-Volt LXT Lithium-Ion Battery for a reasonable $67.70 with free Super Saver shipping. Makita claims that charging it at any time won’t affect the battery’s performance, and that a “built-in memory chip memorizes the usage history and communicates with the charger to to maximize battery life using 3 Active Controls (Current, Voltage & Thermal).” Sixteen contact terminals keep power fluctuations at bay in high-vibration work environments.
Reviews [What’s This?] on Amazon generally indicate that the Makita battery holds a charge extremely well, but that the battery life can wear out too soon. Others recommend sticking with Ni-cads or just protecting the battery from cold weather. What are Toolmongers’ suggestions on the best batteries for your cordless tools?