WARNING: Lithium batteries can explode or cause burns if disassembled, shorted, recharged, exposed to water, fire, or high temperatures. Do not place loose batteries in a pocket, purse, or other container containing metal objects, mix with used or other battery types, or store with hazardous or combustible materials. Store in cool, dry, ventilated area. Follow applicable laws and regulations for transport and disposal.
INFERIOR QUALITY IMPORTED BATTERIES and COUNTERFEIT BATTERY WARNING: There have been several incidences reported of counterfeit and/or low-quality batteries spontaneously combusting or venting, which have resulted in damage to the flashlight and in some cases property damage or personal injury. For this reason SureFire strongly recommends that you use only SureFire-brand lithium batteries (or batteries manufactured by well-known manufacturers such as Panasonic or Duracell) to guarantee safe performance. SureFire's lithium batteries are manufactured to strict quality control standards specifically for use in high-performance, high-drain devices, and contain built-in fault/heat protection. The use of lesser-known or counterfeit brands could damage your SureFire product and may constitute a safety hazard.
To ensure that you get authentic, competitively priced safety designed SureFire batteries, purchase them only from surefire.com or an authorized SureFire reseller. Use of other (non-SureFire) brands of batteries may void your warranty. Customers are specifically cautioned not to purchase batteries from online auction websites, or unauthorized SureFire sites as these are known sources of counterfeit, and/or substandard quality batteries.