We are super excited for Fenix's release of a 16340 battery with a built-in protection circuit.  As with all Fenix products, you have the assurance you are getting the highest quality possible in this new battery addition.  With multiple layers of protection, you can expect 500 charge cycles.

• Fenix ARB-L16-700 16340 Rechargeable Battery
• 700mAh
• Protection Circuit in the Anode to prevent short circuit
• Multiple layers of protection
• 500 charge cycles can be expected from a properly maintained battery.  
• Fully covered wth a steel shell for impact resistance
• Over charge, discharge, short circuit, and over heating protection
• Three sets of over-head protection:  Pressure relief valve protection, separate microporous protection, and PTC cathodal block protection